Merge branch 'stable-4.2'

* stable-4.2:
  Don't use deprecated LockFile constructor
  Fix warnings about unchecked conversion of MergeResult
  MockServletConfig: Fix warning about unchecked conversion of Enumeration
  HugeFileTest: Make Git a class member and open in try-with-resource
  Suppress "unchecked cast" warnings related to UploadPackFactory.DISABLED
  DiffAlgorithms: Fix warnings about variable hiding
  DirCacheBasicTest: Open ObjectInserter.Formatter in try-with-resource
  DirCacheBuilderIteratorTest: Open TreeWalk in try-with-resource
  DirCacheCGitCompatabilityTest: Open TreeWalk in try-with-resource
  DirCacheCheckoutMaliciousPathTest: Open Git and RevWalk in t-w-r
  DirCacheIteratorTest: Open TreeWalk instances in try-with-resource
  ForPathTest: Open TreeWalk in try-with-resource
  GitConstructionTest: Open Git instance in try-with-resource
  IndexDiffTest: Open Git instances in try-with-resources
  ManifestParserTest: Don't use deprecated StringBufferInputStream
  InMemoryRepository: Remove unused RevWalk from batch method signature
  IndexModificationTimesTest: Open Git instances in try-with-resource
  InterIndexDiffFilterTest: Open TreeWalk in try-with-resource
  LockFileTest: Open Git instance in try-with-resource
  JGit v4.1.2.201602141800-r
  MergeCommandTest: Use JUnit's assume to check preconditions
  MergeCommandTest: Open Git instances in try-with-resource

Change-Id: Ie5dba6b9132a29e86958a04fa2b76465bcd2c6b5
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

org.eclipse.jgit.http.test/tst/org/eclipse/jgit/http/test/DefaultReceivePackFactoryTest.java

@@ -79,6 +79,7 @@ public class DefaultReceivePackFactoryTest extends LocalDiskRepositoryTestCase {
 		factory = new DefaultReceivePackFactory();
 	}
 
+	@SuppressWarnings("unchecked")
 	@Test
 	public void testDisabledSingleton() throws ServiceNotAuthorizedException {
 		factory = (ReceivePackFactory<HttpServletRequest>) ReceivePackFactory.DISABLED;

org.eclipse.jgit.http.test/tst/org/eclipse/jgit/http/test/DefaultUploadPackFactoryTest.java

@@ -77,6 +77,7 @@ public class DefaultUploadPackFactoryTest extends LocalDiskRepositoryTestCase {
 		factory = new DefaultUploadPackFactory();
 	}
 
+	@SuppressWarnings("unchecked")
 	@Test
 	public void testDisabledSingleton() throws ServiceNotAuthorizedException {
 		factory = (UploadPackFactory<HttpServletRequest>) UploadPackFactory.DISABLED;

org.eclipse.jgit.junit.http/src/org/eclipse/jgit/junit/http/MockServletConfig.java

@@ -62,7 +62,7 @@ public class MockServletConfig implements ServletConfig {
 		return parameters.get(name);
 	}
 
-	public Enumeration getInitParameterNames() {
+	public Enumeration<String> getInitParameterNames() {
 		final Iterator<String> i = parameters.keySet().iterator();
 		return new Enumeration<String>() {
 			public boolean hasMoreElements() {

org.eclipse.jgit.junit/src/org/eclipse/jgit/junit/TestRepository.java

@@ -905,7 +905,7 @@ public class TestRepository<R extends Repository> {
 
 	private void writeFile(final File p, final byte[] bin) throws IOException,
 			ObjectWritingException {
-		final LockFile lck = new LockFile(p, db.getFS());
+		final LockFile lck = new LockFile(p);
 		if (!lck.lock())
 			throw new ObjectWritingException("Can't write " + p);
 		try {

org.eclipse.jgit.pgm/src/org/eclipse/jgit/pgm/debug/DiffAlgorithms.java

@@ -155,16 +155,16 @@ class DiffAlgorithms extends TextBuiltin {
 			else
 				rb.findGitDir(dir);
 
-			Repository db = rb.build();
+			Repository repo = rb.build();
 			try {
-				run(db);
+				run(repo);
 			} finally {
-				db.close();
+				repo.close();
 			}
 		}
 	}
 
-	private void run(Repository db) throws Exception {
+	private void run(Repository repo) throws Exception {
 		List<Test> all = init();
 
 		long files = 0;
@@ -173,14 +173,14 @@ class DiffAlgorithms extends TextBuiltin {
 		int maxN = 0;
 
 		AbbreviatedObjectId startId;
-		try (ObjectReader or = db.newObjectReader();
+		try (ObjectReader or = repo.newObjectReader();
 			RevWalk rw = new RevWalk(or)) {
 			final MutableObjectId id = new MutableObjectId();
 			TreeWalk tw = new TreeWalk(or);
 			tw.setFilter(TreeFilter.ANY_DIFF);
 			tw.setRecursive(true);
 
-			ObjectId start = db.resolve(Constants.HEAD);
+			ObjectId start = repo.resolve(Constants.HEAD);
 			startId = or.abbreviate(start);
 			rw.markStart(rw.parseCommit(start));
 			for (;;) {
@@ -235,14 +235,15 @@ class DiffAlgorithms extends TextBuiltin {
 
 		Collections.sort(all, new Comparator<Test>() {
 			public int compare(Test a, Test b) {
-				int cmp = Long.signum(a.runningTimeNanos - b.runningTimeNanos);
-				if (cmp == 0)
-					cmp = a.algorithm.name.compareTo(b.algorithm.name);
-				return cmp;
+				int result = Long.signum(a.runningTimeNanos - b.runningTimeNanos);
+				if (result == 0) {
+					result = a.algorithm.name.compareTo(b.algorithm.name);
+				}
+				return result;
 			}
 		});
 
-		File directory = db.getDirectory();
+		File directory = repo.getDirectory();
 		if (directory != null) {
 			String name = directory.getName();
 			File parent = directory.getParentFile();

org.eclipse.jgit.pgm/src/org/eclipse/jgit/pgm/debug/RebuildCommitGraph.java

@@ -235,7 +235,7 @@ class RebuildCommitGraph extends TextBuiltin {
 		final ObjectId id = db.resolve(Constants.HEAD);
 		if (!ObjectId.isId(head) && id != null) {
 			final LockFile lf;
-			lf = new LockFile(new File(db.getDirectory(), Constants.HEAD), db.getFS());
+			lf = new LockFile(new File(db.getDirectory(), Constants.HEAD));
 			if (!lf.lock())
 				throw new IOException(MessageFormat.format(CLIText.get().cannotLock, Constants.HEAD));
 			lf.write(id);
@@ -263,7 +263,7 @@ class RebuildCommitGraph extends TextBuiltin {
 			protected void writeFile(final String name, final byte[] content)
 					throws IOException {
 				final File file = new File(db.getDirectory(), name);
-				final LockFile lck = new LockFile(file, db.getFS());
+				final LockFile lck = new LockFile(file);
 				if (!lck.lock())
 					throw new ObjectWritingException(MessageFormat.format(CLIText.get().cantWrite, file));
 				try {

org.eclipse.jgit.test/tst/org/eclipse/jgit/api/GitConstructionTest.java

@@ -66,11 +66,12 @@ public class GitConstructionTest extends RepositoryTestCase {
 	@Before
 	public void setUp() throws Exception {
 		super.setUp();
-		Git git = new Git(db);
-		git.commit().setMessage("initial commit").call();
-		writeTrashFile("Test.txt", "Hello world");
-		git.add().addFilepattern("Test.txt").call();
-		git.commit().setMessage("Initial commit").call();
+		try (Git git = new Git(db)) {
+			git.commit().setMessage("initial commit").call();
+			writeTrashFile("Test.txt", "Hello world");
+			git.add().addFilepattern("Test.txt").call();
+			git.commit().setMessage("Initial commit").call();
+		}
 
 		bareRepo = Git.cloneRepository().setBare(true)
 				.setURI(db.getDirectory().toURI().toString())

org.eclipse.jgit.test/tst/org/eclipse/jgit/api/HugeFileTest.java

@@ -51,6 +51,8 @@ import java.util.Collection;
 
 import org.eclipse.jgit.api.ResetCommand.ResetType;
 import org.eclipse.jgit.junit.RepositoryTestCase;
+import org.junit.After;
+import org.junit.Before;
 import org.junit.Ignore;
 import org.junit.Test;
 
@@ -60,12 +62,26 @@ public class HugeFileTest extends RepositoryTestCase {
 
 	private long lastt = t;
 
+	private Git git;
+
 	private void measure(String name) {
 		long c = System.currentTimeMillis();
 		System.out.println(name + ", dt=" + (c - lastt) / 1000.0 + "s");
 		lastt = c;
 	}
 
+	@Before
+	public void before() {
+		git = new Git(db);
+	}
+
+	@After
+	public void after() {
+		if (git != null) {
+			git.close();
+		}
+	}
+
 	@Ignore("Test takes way too long (~10 minutes) to be part of the standard suite")
 	@Test
 	public void testAddHugeFile() throws Exception {
@@ -75,7 +91,6 @@ public class HugeFileTest extends RepositoryTestCase {
 		rf.setLength(4429185024L);
 		rf.close();
 		measure("Created file");
-		Git git = new Git(db);
 
 		git.add().addFilepattern("a.txt").call();
 		measure("Added file");

org.eclipse.jgit.test/tst/org/eclipse/jgit/dircache/DirCacheBasicTest.java

@@ -255,9 +255,11 @@ public class DirCacheBasicTest extends RepositoryTestCase {
 		DirCacheBuilder b = dc.builder();
 		DirCacheEntry e = new DirCacheEntry(path);
 		e.setFileMode(FileMode.REGULAR_FILE);
-		e.setObjectId(new ObjectInserter.Formatter().idFor(
-				Constants.OBJ_BLOB,
-				Constants.encode(path)));
+		try (ObjectInserter.Formatter formatter = new ObjectInserter.Formatter()) {
+			e.setObjectId(formatter.idFor(
+					Constants.OBJ_BLOB,
+					Constants.encode(path)));
+		}
 		b.add(e);
 		b.commit();
 		db.readDirCache();

org.eclipse.jgit.test/tst/org/eclipse/jgit/dircache/DirCacheBuilderIteratorTest.java

@@ -78,23 +78,24 @@ public class DirCacheBuilderIteratorTest extends RepositoryTestCase {
 
 		final int expIdx = 2;
 		final DirCacheBuilder b = dc.builder();
-		final TreeWalk tw = new TreeWalk(db);
-		tw.addTree(new DirCacheBuildIterator(b));
-		tw.setRecursive(true);
-		tw.setFilter(PathFilterGroup.createFromStrings(Collections
-				.singleton(paths[expIdx])));
+		try (final TreeWalk tw = new TreeWalk(db)) {
+			tw.addTree(new DirCacheBuildIterator(b));
+			tw.setRecursive(true);
+			tw.setFilter(PathFilterGroup.createFromStrings(Collections
+					.singleton(paths[expIdx])));
 
-		assertTrue("found " + paths[expIdx], tw.next());
-		final DirCacheIterator c = tw.getTree(0, DirCacheIterator.class);
-		assertNotNull(c);
-		assertEquals(expIdx, c.ptr);
-		assertSame(ents[expIdx], c.getDirCacheEntry());
-		assertEquals(paths[expIdx], tw.getPathString());
-		assertEquals(mode.getBits(), tw.getRawMode(0));
-		assertSame(mode, tw.getFileMode(0));
-		b.add(c.getDirCacheEntry());
+			assertTrue("found " + paths[expIdx], tw.next());
+			final DirCacheIterator c = tw.getTree(0, DirCacheIterator.class);
+			assertNotNull(c);
+			assertEquals(expIdx, c.ptr);
+			assertSame(ents[expIdx], c.getDirCacheEntry());
+			assertEquals(paths[expIdx], tw.getPathString());
+			assertEquals(mode.getBits(), tw.getRawMode(0));
+			assertSame(mode, tw.getFileMode(0));
+			b.add(c.getDirCacheEntry());
 
-		assertFalse("no more entries", tw.next());
+			assertFalse("no more entries", tw.next());
+		}
 
 		b.finish();
 		assertEquals(ents.length, dc.getEntryCount());

org.eclipse.jgit.test/tst/org/eclipse/jgit/dircache/DirCacheCGitCompatabilityTest.java

@@ -98,17 +98,18 @@ public class DirCacheCGitCompatabilityTest extends LocalDiskRepositoryTestCase {
 		assertEquals(ls.size(), dc.getEntryCount());
 		{
 			final Iterator<CGitIndexRecord> rItr = ls.values().iterator();
-			final TreeWalk tw = new TreeWalk(db);
-			tw.setRecursive(true);
-			tw.addTree(new DirCacheIterator(dc));
-			while (rItr.hasNext()) {
-				final DirCacheIterator dcItr;
-
-				assertTrue(tw.next());
-				dcItr = tw.getTree(0, DirCacheIterator.class);
-				assertNotNull(dcItr);
-
-				assertEqual(rItr.next(), dcItr.getDirCacheEntry());
+			try (final TreeWalk tw = new TreeWalk(db)) {
+				tw.setRecursive(true);
+				tw.addTree(new DirCacheIterator(dc));
+				while (rItr.hasNext()) {
+					final DirCacheIterator dcItr;
+
+					assertTrue(tw.next());
+					dcItr = tw.getTree(0, DirCacheIterator.class);
+					assertNotNull(dcItr);
+
+					assertEqual(rItr.next(), dcItr.getDirCacheEntry());
+				}
 			}
 		}
 	}

org.eclipse.jgit.test/tst/org/eclipse/jgit/dircache/DirCacheIteratorTest.java

@@ -76,9 +76,10 @@ public class DirCacheIteratorTest extends RepositoryTestCase {
 		final DirCache dc = DirCache.newInCore();
 		assertEquals(0, dc.getEntryCount());
 
-		final TreeWalk tw = new TreeWalk(db);
-		tw.addTree(new DirCacheIterator(dc));
-		assertFalse(tw.next());
+		try (final TreeWalk tw = new TreeWalk(db)) {
+			tw.addTree(new DirCacheIterator(dc));
+			assertFalse(tw.next());
+		}
 	}
 
 	@Test
@@ -125,19 +126,20 @@ public class DirCacheIteratorTest extends RepositoryTestCase {
 		b.finish();
 
 		final DirCacheIterator i = new DirCacheIterator(dc);
-		final TreeWalk tw = new TreeWalk(db);
-		tw.addTree(i);
-		int pathIdx = 0;
-		while (tw.next()) {
-			assertSame(i, tw.getTree(0, DirCacheIterator.class));
-			assertEquals(pathIdx, i.ptr);
-			assertSame(ents[pathIdx], i.getDirCacheEntry());
-			assertEquals(paths[pathIdx], tw.getPathString());
-			assertEquals(modes[pathIdx].getBits(), tw.getRawMode(0));
-			assertSame(modes[pathIdx], tw.getFileMode(0));
-			pathIdx++;
+		try (final TreeWalk tw = new TreeWalk(db)) {
+			tw.addTree(i);
+			int pathIdx = 0;
+			while (tw.next()) {
+				assertSame(i, tw.getTree(0, DirCacheIterator.class));
+				assertEquals(pathIdx, i.ptr);
+				assertSame(ents[pathIdx], i.getDirCacheEntry());
+				assertEquals(paths[pathIdx], tw.getPathString());
+				assertEquals(modes[pathIdx].getBits(), tw.getRawMode(0));
+				assertSame(modes[pathIdx], tw.getFileMode(0));
+				pathIdx++;
+			}
+			assertEquals(paths.length, pathIdx);
 		}
-		assertEquals(paths.length, pathIdx);
 	}
 
 	@Test
@@ -162,26 +164,27 @@ public class DirCacheIteratorTest extends RepositoryTestCase {
 		final int expPos[] = { 0, -1, 4 };
 
 		final DirCacheIterator i = new DirCacheIterator(dc);
-		final TreeWalk tw = new TreeWalk(db);
-		tw.addTree(i);
-		tw.setRecursive(false);
-		int pathIdx = 0;
-		while (tw.next()) {
-			assertSame(i, tw.getTree(0, DirCacheIterator.class));
-			assertEquals(expModes[pathIdx].getBits(), tw.getRawMode(0));
-			assertSame(expModes[pathIdx], tw.getFileMode(0));
-			assertEquals(expPaths[pathIdx], tw.getPathString());
-
-			if (expPos[pathIdx] >= 0) {
-				assertEquals(expPos[pathIdx], i.ptr);
-				assertSame(ents[expPos[pathIdx]], i.getDirCacheEntry());
-			} else {
-				assertSame(FileMode.TREE, tw.getFileMode(0));
+		try (final TreeWalk tw = new TreeWalk(db)) {
+			tw.addTree(i);
+			tw.setRecursive(false);
+			int pathIdx = 0;
+			while (tw.next()) {
+				assertSame(i, tw.getTree(0, DirCacheIterator.class));
+				assertEquals(expModes[pathIdx].getBits(), tw.getRawMode(0));
+				assertSame(expModes[pathIdx], tw.getFileMode(0));
+				assertEquals(expPaths[pathIdx], tw.getPathString());
+
+				if (expPos[pathIdx] >= 0) {
+					assertEquals(expPos[pathIdx], i.ptr);
+					assertSame(ents[expPos[pathIdx]], i.getDirCacheEntry());
+				} else {
+					assertSame(FileMode.TREE, tw.getFileMode(0));
+				}
+
+				pathIdx++;
 			}
-
-			pathIdx++;
+			assertEquals(expPaths.length, pathIdx);
 		}
-		assertEquals(expPaths.length, pathIdx);
 	}
 
 	@Test
@@ -202,21 +205,22 @@ public class DirCacheIteratorTest extends RepositoryTestCase {
 		b.finish();
 
 		final DirCacheIterator i = new DirCacheIterator(dc);
-		final TreeWalk tw = new TreeWalk(db);
-		tw.addTree(i);
-		tw.setRecursive(true);
-		int pathIdx = 0;
-		while (tw.next()) {
-			final DirCacheIterator c = tw.getTree(0, DirCacheIterator.class);
-			assertNotNull(c);
-			assertEquals(pathIdx, c.ptr);
-			assertSame(ents[pathIdx], c.getDirCacheEntry());
-			assertEquals(paths[pathIdx], tw.getPathString());
-			assertEquals(mode.getBits(), tw.getRawMode(0));
-			assertSame(mode, tw.getFileMode(0));
-			pathIdx++;
+		try (final TreeWalk tw = new TreeWalk(db)) {
+			tw.addTree(i);
+			tw.setRecursive(true);
+			int pathIdx = 0;
+			while (tw.next()) {
+				final DirCacheIterator c = tw.getTree(0, DirCacheIterator.class);
+				assertNotNull(c);
+				assertEquals(pathIdx, c.ptr);
+				assertSame(ents[pathIdx], c.getDirCacheEntry());
+				assertEquals(paths[pathIdx], tw.getPathString());
+				assertEquals(mode.getBits(), tw.getRawMode(0));
+				assertSame(mode, tw.getFileMode(0));
+				pathIdx++;
+			}
+			assertEquals(paths.length, pathIdx);
 		}
-		assertEquals(paths.length, pathIdx);
 	}
 
 	@Test
@@ -236,21 +240,22 @@ public class DirCacheIteratorTest extends RepositoryTestCase {
 			b.add(ents[i]);
 		b.finish();
 
-		final TreeWalk tw = new TreeWalk(db);
-		tw.addTree(new DirCacheIterator(dc));
-		tw.setRecursive(true);
-		int pathIdx = 0;
-		while (tw.next()) {
-			final DirCacheIterator c = tw.getTree(0, DirCacheIterator.class);
-			assertNotNull(c);
-			assertEquals(pathIdx, c.ptr);
-			assertSame(ents[pathIdx], c.getDirCacheEntry());
-			assertEquals(paths[pathIdx], tw.getPathString());
-			assertEquals(mode.getBits(), tw.getRawMode(0));
-			assertSame(mode, tw.getFileMode(0));
-			pathIdx++;
+		try (final TreeWalk tw = new TreeWalk(db)) {
+			tw.addTree(new DirCacheIterator(dc));
+			tw.setRecursive(true);
+			int pathIdx = 0;
+			while (tw.next()) {
+				final DirCacheIterator c = tw.getTree(0, DirCacheIterator.class);
+				assertNotNull(c);
+				assertEquals(pathIdx, c.ptr);
+				assertSame(ents[pathIdx], c.getDirCacheEntry());
+				assertEquals(paths[pathIdx], tw.getPathString());
+				assertEquals(mode.getBits(), tw.getRawMode(0));
+				assertSame(mode, tw.getFileMode(0));
+				pathIdx++;
+			}
+			assertEquals(paths.length, pathIdx);
 		}
-		assertEquals(paths.length, pathIdx);
 	}
 
 	@Test
@@ -397,22 +402,23 @@ public class DirCacheIteratorTest extends RepositoryTestCase {
 			b.add(ents[i]);
 		b.finish();
 
-		final TreeWalk tw = new TreeWalk(db);
-		for (int victimIdx = 0; victimIdx < paths.length; victimIdx++) {
-			tw.reset();
-			tw.addTree(new DirCacheIterator(dc));
-			tw.setFilter(PathFilterGroup.createFromStrings(Collections
-					.singleton(paths[victimIdx])));
-			tw.setRecursive(tw.getFilter().shouldBeRecursive());
-			assertTrue(tw.next());
-			final DirCacheIterator c = tw.getTree(0, DirCacheIterator.class);
-			assertNotNull(c);
-			assertEquals(victimIdx, c.ptr);
-			assertSame(ents[victimIdx], c.getDirCacheEntry());
-			assertEquals(paths[victimIdx], tw.getPathString());
-			assertEquals(mode.getBits(), tw.getRawMode(0));
-			assertSame(mode, tw.getFileMode(0));
-			assertFalse(tw.next());
+		try (final TreeWalk tw = new TreeWalk(db)) {
+			for (int victimIdx = 0; victimIdx < paths.length; victimIdx++) {
+				tw.reset();
+				tw.addTree(new DirCacheIterator(dc));
+				tw.setFilter(PathFilterGroup.createFromStrings(Collections
+						.singleton(paths[victimIdx])));
+				tw.setRecursive(tw.getFilter().shouldBeRecursive());
+				assertTrue(tw.next());
+				final DirCacheIterator c = tw.getTree(0, DirCacheIterator.class);
+				assertNotNull(c);
+				assertEquals(victimIdx, c.ptr);
+				assertSame(ents[victimIdx], c.getDirCacheEntry());
+				assertEquals(paths[victimIdx], tw.getPathString());
+				assertEquals(mode.getBits(), tw.getRawMode(0));
+				assertSame(mode, tw.getFileMode(0));
+				assertFalse(tw.next());
+			}
 		}
 	}
 
@@ -424,18 +430,19 @@ public class DirCacheIteratorTest extends RepositoryTestCase {
 		final DirCache dc = DirCache.read(path, FS.DETECTED);
 		assertEquals(2, dc.getEntryCount());
 
-		final TreeWalk tw = new TreeWalk(db);
-		tw.setRecursive(true);
-		tw.addTree(new DirCacheIterator(dc));
+		try (final TreeWalk tw = new TreeWalk(db)) {
+			tw.setRecursive(true);
+			tw.addTree(new DirCacheIterator(dc));
 
-		assertTrue(tw.next());
-		assertEquals("a/a", tw.getPathString());
-		assertSame(FileMode.REGULAR_FILE, tw.getFileMode(0));
+			assertTrue(tw.next());
+			assertEquals("a/a", tw.getPathString());
+			assertSame(FileMode.REGULAR_FILE, tw.getFileMode(0));
 
-		assertTrue(tw.next());
-		assertEquals("q", tw.getPathString());
-		assertSame(FileMode.REGULAR_FILE, tw.getFileMode(0));
+			assertTrue(tw.next());
+			assertEquals("q", tw.getPathString());
+			assertSame(FileMode.REGULAR_FILE, tw.getFileMode(0));
 
-		assertFalse(tw.next());
+			assertFalse(tw.next());
+		}
 	}
 }

org.eclipse.jgit.test/tst/org/eclipse/jgit/gitrepo/ManifestParserTest.java

@@ -43,8 +43,9 @@
 package org.eclipse.jgit.gitrepo;
 
 import static org.junit.Assert.assertTrue;
+import static java.nio.charset.StandardCharsets.UTF_8;
 
-import java.io.StringBufferInputStream;
+import java.io.ByteArrayInputStream;
 import java.util.HashSet;
 import java.util.Set;
 
@@ -77,7 +78,7 @@ public class ManifestParserTest {
 
 		ManifestParser parser = new ManifestParser(
 				null, null, "master", baseUrl, null, null);
-		parser.read(new StringBufferInputStream(xmlContent.toString()));
+		parser.read(new ByteArrayInputStream(xmlContent.toString().getBytes(UTF_8)));
 		// Unfiltered projects should have them all.
 		results.clear();
 		results.add("foo");

org.eclipse.jgit.test/tst/org/eclipse/jgit/internal/storage/file/GcPackRefsTest.java

@@ -118,7 +118,7 @@ public class GcPackRefsTest extends GcTestCase {
 		tr.lightweightTag("t1", a);
 		tr.lightweightTag("t2", a);
 		LockFile refLock = new LockFile(new File(repo.getDirectory(),
-				"refs/tags/t1"), repo.getFS());
+				"refs/tags/t1"));
 		try {
 			refLock.lock();
 			gc.packRefs();

org.eclipse.jgit.test/tst/org/eclipse/jgit/internal/storage/file/LockFileTest.java

@@ -61,25 +61,26 @@ public class LockFileTest extends RepositoryTestCase {
 
 	@Test
 	public void lockFailedExceptionRecovery() throws Exception {
-		Git git = new Git(db);
-		writeTrashFile("file.txt", "content");
-		git.add().addFilepattern("file.txt").call();
-		RevCommit commit1 = git.commit().setMessage("create file").call();
+		try (Git git = new Git(db)) {
+			writeTrashFile("file.txt", "content");
+			git.add().addFilepattern("file.txt").call();
+			RevCommit commit1 = git.commit().setMessage("create file").call();
 
-		assertNotNull(commit1);
-		writeTrashFile("file.txt", "content2");
-		git.add().addFilepattern("file.txt").call();
-		assertNotNull(git.commit().setMessage("edit file").call());
+			assertNotNull(commit1);
+			writeTrashFile("file.txt", "content2");
+			git.add().addFilepattern("file.txt").call();
+			assertNotNull(git.commit().setMessage("edit file").call());
 
-		LockFile lf = new LockFile(db.getIndexFile(), db.getFS());
-		assertTrue(lf.lock());
-		try {
-			git.checkout().setName(commit1.name()).call();
-			fail("JGitInternalException not thrown");
-		} catch (JGitInternalException e) {
-			assertTrue(e.getCause() instanceof LockFailedException);
-			lf.unlock();
-			git.checkout().setName(commit1.name()).call();
+			LockFile lf = new LockFile(db.getIndexFile());
+			assertTrue(lf.lock());
+			try {
+				git.checkout().setName(commit1.name()).call();
+				fail("JGitInternalException not thrown");
+			} catch (JGitInternalException e) {
+				assertTrue(e.getCause() instanceof LockFailedException);
+				lf.unlock();
+				git.checkout().setName(commit1.name()).call();
+			}
 		}
 	}
 }

org.eclipse.jgit.test/tst/org/eclipse/jgit/internal/storage/file/RefUpdateTest.java

@@ -597,14 +597,13 @@ public class RefUpdateTest extends SampleDataRepositoryTestCase {
 		RefUpdate updateRef = db.updateRef("refs/heads/master");
 		updateRef.setNewObjectId(pid);
 		LockFile lockFile1 = new LockFile(new File(db.getDirectory(),
-				"refs/heads/master"), db.getFS());
+				"refs/heads/master"));
 		try {
 			assertTrue(lockFile1.lock()); // precondition to test
 			Result update = updateRef.update();
 			assertEquals(Result.LOCK_FAILURE, update);
 			assertEquals(opid, db.resolve("refs/heads/master"));
-			LockFile lockFile2 = new LockFile(new File(db.getDirectory(),"refs/heads/master"),
-					db.getFS());
+			LockFile lockFile2 = new LockFile(new File(db.getDirectory(),"refs/heads/master"));
 			assertFalse(lockFile2.lock()); // was locked, still is
 		} finally {
 			lockFile1.unlock();
@@ -747,8 +746,7 @@ public class RefUpdateTest extends SampleDataRepositoryTestCase {
 				"logs/" + fromName).exists());
 
 		// "someone" has branch X locked
-		LockFile lockFile = new LockFile(new File(db.getDirectory(), toLock),
-				db.getFS());
+		LockFile lockFile = new LockFile(new File(db.getDirectory(), toLock));
 		try {
 			assertTrue(lockFile.lock());
 

org.eclipse.jgit.test/tst/org/eclipse/jgit/lib/DirCacheCheckoutMaliciousPathTest.java

@@ -338,68 +338,69 @@ public class DirCacheCheckoutMaliciousPathTest extends RepositoryTestCase {
 	 */
 	private void testMaliciousPath(boolean good, boolean secondCheckout,
 			String... path) throws GitAPIException, IOException {
-		Git git = new Git(db);
-		ObjectInserter newObjectInserter;
-		newObjectInserter = git.getRepository().newObjectInserter();
-		ObjectId blobId = newObjectInserter.insert(Constants.OBJ_BLOB,
-				"data".getBytes());
-		newObjectInserter = git.getRepository().newObjectInserter();
-		FileMode mode = FileMode.REGULAR_FILE;
-		ObjectId insertId = blobId;
-		for (int i = path.length - 1; i >= 0; --i) {
-			TreeFormatter treeFormatter = new TreeFormatter();
-			treeFormatter.append("goodpath", mode, insertId);
-			insertId = newObjectInserter.insert(treeFormatter);
-			mode = FileMode.TREE;
-		}
-		newObjectInserter = git.getRepository().newObjectInserter();
-		CommitBuilder commitBuilder = new CommitBuilder();
-		commitBuilder.setAuthor(author);
-		commitBuilder.setCommitter(committer);
-		commitBuilder.setMessage("foo#1");
-		commitBuilder.setTreeId(insertId);
-		ObjectId firstCommitId = newObjectInserter.insert(commitBuilder);
-
-		newObjectInserter = git.getRepository().newObjectInserter();
-		mode = FileMode.REGULAR_FILE;
-		insertId = blobId;
-		for (int i = path.length - 1; i >= 0; --i) {
-			TreeFormatter treeFormatter = new TreeFormatter();
-			treeFormatter.append(path[i], mode, insertId);
-			insertId = newObjectInserter.insert(treeFormatter);
-			mode = FileMode.TREE;
-		}
+		try (Git git = new Git(db);
+				RevWalk revWalk = new RevWalk(git.getRepository())) {
+			ObjectInserter newObjectInserter;
+			newObjectInserter = git.getRepository().newObjectInserter();
+			ObjectId blobId = newObjectInserter.insert(Constants.OBJ_BLOB,
+					"data".getBytes());
+			newObjectInserter = git.getRepository().newObjectInserter();
+			FileMode mode = FileMode.REGULAR_FILE;
+			ObjectId insertId = blobId;
+			for (int i = path.length - 1; i >= 0; --i) {
+				TreeFormatter treeFormatter = new TreeFormatter();
+				treeFormatter.append("goodpath", mode, insertId);
+				insertId = newObjectInserter.insert(treeFormatter);
+				mode = FileMode.TREE;
+			}
+			newObjectInserter = git.getRepository().newObjectInserter();
+			CommitBuilder commitBuilder = new CommitBuilder();
+			commitBuilder.setAuthor(author);
+			commitBuilder.setCommitter(committer);
+			commitBuilder.setMessage("foo#1");
+			commitBuilder.setTreeId(insertId);
+			ObjectId firstCommitId = newObjectInserter.insert(commitBuilder);
+
+			newObjectInserter = git.getRepository().newObjectInserter();
+			mode = FileMode.REGULAR_FILE;
+			insertId = blobId;
+			for (int i = path.length - 1; i >= 0; --i) {
+				TreeFormatter treeFormatter = new TreeFormatter();
+				treeFormatter.append(path[i], mode, insertId);
+				insertId = newObjectInserter.insert(treeFormatter);
+				mode = FileMode.TREE;
+			}
 
-		// Create another commit
-		commitBuilder = new CommitBuilder();
-		commitBuilder.setAuthor(author);
-		commitBuilder.setCommitter(committer);
-		commitBuilder.setMessage("foo#2");
-		commitBuilder.setTreeId(insertId);
-		commitBuilder.setParentId(firstCommitId);
-		ObjectId commitId = newObjectInserter.insert(commitBuilder);
-
-		RevWalk revWalk = new RevWalk(git.getRepository());
-		if (!secondCheckout)
-			git.checkout().setStartPoint(revWalk.parseCommit(firstCommitId))
-					.setName("refs/heads/master").setCreateBranch(true).call();
-		try {
-			if (secondCheckout) {
-				git.checkout().setStartPoint(revWalk.parseCommit(commitId))
-						.setName("refs/heads/master").setCreateBranch(true)
-						.call();
-			} else {
-				git.branchCreate().setName("refs/heads/next")
-						.setStartPoint(commitId.name()).call();
-				git.checkout().setName("refs/heads/next")
-						.call();
+			// Create another commit
+			commitBuilder = new CommitBuilder();
+			commitBuilder.setAuthor(author);
+			commitBuilder.setCommitter(committer);
+			commitBuilder.setMessage("foo#2");
+			commitBuilder.setTreeId(insertId);
+			commitBuilder.setParentId(firstCommitId);
+			ObjectId commitId = newObjectInserter.insert(commitBuilder);
+
+			if (!secondCheckout)
+				git.checkout().setStartPoint(revWalk.parseCommit(firstCommitId))
+						.setName("refs/heads/master").setCreateBranch(true).call();
+			try {
+				if (secondCheckout) {
+					git.checkout().setStartPoint(revWalk.parseCommit(commitId))
+							.setName("refs/heads/master").setCreateBranch(true)
+							.call();
+				} else {
+					git.branchCreate().setName("refs/heads/next")
+							.setStartPoint(commitId.name()).call();
+					git.checkout().setName("refs/heads/next")
+							.call();
+				}
+				if (!good)
+					fail("Checkout of Tree " + Arrays.asList(path) + " should fail");
+			} catch (InvalidPathException e) {
+				if (good)
+					throw e;
+				assertTrue(e.getMessage().startsWith("Invalid path"));
 			}
-			if (!good)
-				fail("Checkout of Tree " + Arrays.asList(path) + " should fail");
-		} catch (InvalidPathException e) {
-			if (good)
-				throw e;
-			assertTrue(e.getMessage().startsWith("Invalid path"));
 		}
 	}
 

org.eclipse.jgit.test/tst/org/eclipse/jgit/lib/IndexDiffTest.java

@@ -148,8 +148,9 @@ public class IndexDiffTest extends RepositoryTestCase {
 		writeTrashFile("file2", "file2");
 		writeTrashFile("dir/file3", "dir/file3");
 
-		Git git = new Git(db);
-		git.add().addFilepattern("file2").addFilepattern("dir/file3").call();
+		try (Git git = new Git(db)) {
+			git.add().addFilepattern("file2").addFilepattern("dir/file3").call();
+		}
 
 		writeTrashFile("dir/file3", "changed");
 
@@ -177,31 +178,31 @@ public class IndexDiffTest extends RepositoryTestCase {
 
 	@Test
 	public void testConflicting() throws Exception {
-		Git git = new Git(db);
-
-		writeTrashFile("a", "1\na\n3\n");
-		writeTrashFile("b", "1\nb\n3\n");
-		git.add().addFilepattern("a").addFilepattern("b").call();
-		RevCommit initialCommit = git.commit().setMessage("initial").call();
-
-		// create side branch with two modifications
-		createBranch(initialCommit, "refs/heads/side");
-		checkoutBranch("refs/heads/side");
-		writeTrashFile("a", "1\na(side)\n3\n");
-		writeTrashFile("b", "1\nb\n3\n(side)");
-		git.add().addFilepattern("a").addFilepattern("b").call();
-		RevCommit secondCommit = git.commit().setMessage("side").call();
-
-		// update a on master to generate conflict
-		checkoutBranch("refs/heads/master");
-		writeTrashFile("a", "1\na(main)\n3\n");
-		git.add().addFilepattern("a").call();
-		git.commit().setMessage("main").call();
-
-		// merge side with master
-		MergeResult result = git.merge().include(secondCommit.getId())
-				.setStrategy(MergeStrategy.RESOLVE).call();
-		assertEquals(MergeStatus.CONFLICTING, result.getMergeStatus());
+		try (Git git = new Git(db)) {
+			writeTrashFile("a", "1\na\n3\n");
+			writeTrashFile("b", "1\nb\n3\n");
+			git.add().addFilepattern("a").addFilepattern("b").call();
+			RevCommit initialCommit = git.commit().setMessage("initial").call();
+
+			// create side branch with two modifications
+			createBranch(initialCommit, "refs/heads/side");
+			checkoutBranch("refs/heads/side");
+			writeTrashFile("a", "1\na(side)\n3\n");
+			writeTrashFile("b", "1\nb\n3\n(side)");
+			git.add().addFilepattern("a").addFilepattern("b").call();
+			RevCommit secondCommit = git.commit().setMessage("side").call();
+
+			// update a on master to generate conflict
+			checkoutBranch("refs/heads/master");
+			writeTrashFile("a", "1\na(main)\n3\n");
+			git.add().addFilepattern("a").call();
+			git.commit().setMessage("main").call();
+
+			// merge side with master
+			MergeResult result = git.merge().include(secondCommit.getId())
+					.setStrategy(MergeStrategy.RESOLVE).call();
+			assertEquals(MergeStatus.CONFLICTING, result.getMergeStatus());
+		}
 
 		FileTreeIterator iterator = new FileTreeIterator(db);
 		IndexDiff diff = new IndexDiff(db, Constants.HEAD, iterator);
@@ -221,29 +222,29 @@ public class IndexDiffTest extends RepositoryTestCase {
 
 	@Test
 	public void testConflictingDeletedAndModified() throws Exception {
-		Git git = new Git(db);
-
-		writeTrashFile("a", "1\na\n3\n");
-		writeTrashFile("b", "1\nb\n3\n");
-		git.add().addFilepattern("a").addFilepattern("b").call();
-		RevCommit initialCommit = git.commit().setMessage("initial").call();
-
-		// create side branch and delete "a"
-		createBranch(initialCommit, "refs/heads/side");
-		checkoutBranch("refs/heads/side");
-		git.rm().addFilepattern("a").call();
-		RevCommit secondCommit = git.commit().setMessage("side").call();
-
-		// update a on master to generate conflict
-		checkoutBranch("refs/heads/master");
-		writeTrashFile("a", "1\na(main)\n3\n");
-		git.add().addFilepattern("a").call();
-		git.commit().setMessage("main").call();
-
-		// merge side with master
-		MergeResult result = git.merge().include(secondCommit.getId())
-				.setStrategy(MergeStrategy.RESOLVE).call();
-		assertEquals(MergeStatus.CONFLICTING, result.getMergeStatus());
+		try (Git git = new Git(db)) {
+			writeTrashFile("a", "1\na\n3\n");
+			writeTrashFile("b", "1\nb\n3\n");
+			git.add().addFilepattern("a").addFilepattern("b").call();
+			RevCommit initialCommit = git.commit().setMessage("initial").call();
+
+			// create side branch and delete "a"
+			createBranch(initialCommit, "refs/heads/side");
+			checkoutBranch("refs/heads/side");
+			git.rm().addFilepattern("a").call();
+			RevCommit secondCommit = git.commit().setMessage("side").call();
+
+			// update a on master to generate conflict
+			checkoutBranch("refs/heads/master");
+			writeTrashFile("a", "1\na(main)\n3\n");
+			git.add().addFilepattern("a").call();
+			git.commit().setMessage("main").call();
+
+			// merge side with master
+			MergeResult result = git.merge().include(secondCommit.getId())
+					.setStrategy(MergeStrategy.RESOLVE).call();
+			assertEquals(MergeStatus.CONFLICTING, result.getMergeStatus());
+		}
 
 		FileTreeIterator iterator = new FileTreeIterator(db);
 		IndexDiff diff = new IndexDiff(db, Constants.HEAD, iterator);
@@ -262,28 +263,28 @@ public class IndexDiffTest extends RepositoryTestCase {
 
 	@Test
 	public void testConflictingFromMultipleCreations() throws Exception {
-		Git git = new Git(db);
+		try (Git git = new Git(db)) {
+			writeTrashFile("a", "1\na\n3\n");
+			git.add().addFilepattern("a").call();
+			RevCommit initialCommit = git.commit().setMessage("initial").call();
 
-		writeTrashFile("a", "1\na\n3\n");
-		git.add().addFilepattern("a").call();
-		RevCommit initialCommit = git.commit().setMessage("initial").call();
+			createBranch(initialCommit, "refs/heads/side");
+			checkoutBranch("refs/heads/side");
 
-		createBranch(initialCommit, "refs/heads/side");
-		checkoutBranch("refs/heads/side");
+			writeTrashFile("b", "1\nb(side)\n3\n");
+			git.add().addFilepattern("b").call();
+			RevCommit secondCommit = git.commit().setMessage("side").call();
 
-		writeTrashFile("b", "1\nb(side)\n3\n");
-		git.add().addFilepattern("b").call();
-		RevCommit secondCommit = git.commit().setMessage("side").call();
+			checkoutBranch("refs/heads/master");
 
-		checkoutBranch("refs/heads/master");
+			writeTrashFile("b", "1\nb(main)\n3\n");
+			git.add().addFilepattern("b").call();
+			git.commit().setMessage("main").call();
 
-		writeTrashFile("b", "1\nb(main)\n3\n");
-		git.add().addFilepattern("b").call();
-		git.commit().setMessage("main").call();
-
-		MergeResult result = git.merge().include(secondCommit.getId())
-				.setStrategy(MergeStrategy.RESOLVE).call();
-		assertEquals(MergeStatus.CONFLICTING, result.getMergeStatus());
+			MergeResult result = git.merge().include(secondCommit.getId())
+					.setStrategy(MergeStrategy.RESOLVE).call();
+			assertEquals(MergeStatus.CONFLICTING, result.getMergeStatus());
+		}
 
 		FileTreeIterator iterator = new FileTreeIterator(db);
 		IndexDiff diff = new IndexDiff(db, Constants.HEAD, iterator);
@@ -304,11 +305,12 @@ public class IndexDiffTest extends RepositoryTestCase {
 		writeTrashFile("a.c", "a.c");
 		writeTrashFile("a=c", "a=c");
 		writeTrashFile("a=d", "a=d");
-		Git git = new Git(db);
-		git.add().addFilepattern("a.b").call();
-		git.add().addFilepattern("a.c").call();
-		git.add().addFilepattern("a=c").call();
-		git.add().addFilepattern("a=d").call();
+		try (Git git = new Git(db)) {
+			git.add().addFilepattern("a.b").call();
+			git.add().addFilepattern("a.c").call();
+			git.add().addFilepattern("a=c").call();
+			git.add().addFilepattern("a=d").call();
+		}
 
 		TreeFormatter tree = new TreeFormatter();
 		// got the hash id'd from the data using echo -n a.b|git hash-object -t blob --stdin
@@ -338,7 +340,6 @@ public class IndexDiffTest extends RepositoryTestCase {
 	 */
 	@Test
 	public void testUnchangedComplex() throws IOException, GitAPIException {
-		Git git = new Git(db);
 		writeTrashFile("a.b", "a.b");
 		writeTrashFile("a.c", "a.c");
 		writeTrashFile("a/b.b/b", "a/b.b/b");
@@ -346,10 +347,12 @@ public class IndexDiffTest extends RepositoryTestCase {
 		writeTrashFile("a/c", "a/c");
 		writeTrashFile("a=c", "a=c");
 		writeTrashFile("a=d", "a=d");
-		git.add().addFilepattern("a.b").addFilepattern("a.c")
-				.addFilepattern("a/b.b/b").addFilepattern("a/b")
-				.addFilepattern("a/c").addFilepattern("a=c")
-				.addFilepattern("a=d").call();
+		try (Git git = new Git(db)) {
+			git.add().addFilepattern("a.b").addFilepattern("a.c")
+					.addFilepattern("a/b.b/b").addFilepattern("a/b")
+					.addFilepattern("a/c").addFilepattern("a=c")
+					.addFilepattern("a=d").call();
+		}
 
 
 		// got the hash id'd from the data using echo -n a.b|git hash-object -t blob --stdin
@@ -397,11 +400,12 @@ public class IndexDiffTest extends RepositoryTestCase {
 	 */
 	@Test
 	public void testRemovedUntracked() throws Exception{
-		Git git = new Git(db);
 		String path = "file";
-		writeTrashFile(path, "content");
-		git.add().addFilepattern(path).call();
-		git.commit().setMessage("commit").call();
+		try (Git git = new Git(db)) {
+			writeTrashFile(path, "content");
+			git.add().addFilepattern(path).call();
+			git.commit().setMessage("commit").call();
+		}
 		removeFromIndex(path);
 		FileTreeIterator iterator = new FileTreeIterator(db);
 		IndexDiff diff = new IndexDiff(db, Constants.HEAD, iterator);
@@ -417,51 +421,51 @@ public class IndexDiffTest extends RepositoryTestCase {
 	 */
 	@Test
 	public void testUntrackedFolders() throws Exception {
-		Git git = new Git(db);
-
-		IndexDiff diff = new IndexDiff(db, Constants.HEAD,
-				new FileTreeIterator(db));
-		diff.diff();
-		assertEquals(Collections.EMPTY_SET, diff.getUntrackedFolders());
-
-		writeTrashFile("readme", "");
-		writeTrashFile("src/com/A.java", "");
-		writeTrashFile("src/com/B.java", "");
-		writeTrashFile("src/org/A.java", "");
-		writeTrashFile("src/org/B.java", "");
-		writeTrashFile("target/com/A.java", "");
-		writeTrashFile("target/com/B.java", "");
-		writeTrashFile("target/org/A.java", "");
-		writeTrashFile("target/org/B.java", "");
-
-		git.add().addFilepattern("src").addFilepattern("readme").call();
-		git.commit().setMessage("initial").call();
-
-		diff = new IndexDiff(db, Constants.HEAD,
-				new FileTreeIterator(db));
-		diff.diff();
-		assertEquals(new HashSet<String>(Arrays.asList("target")),
-				diff.getUntrackedFolders());
-
-		writeTrashFile("src/tst/A.java", "");
-		writeTrashFile("src/tst/B.java", "");
-
-		diff = new IndexDiff(db, Constants.HEAD, new FileTreeIterator(db));
-		diff.diff();
-		assertEquals(new HashSet<String>(Arrays.asList("target", "src/tst")),
-				diff.getUntrackedFolders());
-
-		git.rm().addFilepattern("src/com/B.java").addFilepattern("src/org")
-				.call();
-		git.commit().setMessage("second").call();
-		writeTrashFile("src/org/C.java", "");
-
-		diff = new IndexDiff(db, Constants.HEAD, new FileTreeIterator(db));
-		diff.diff();
-		assertEquals(
-				new HashSet<String>(Arrays.asList("src/org", "src/tst",
-						"target")),
-				diff.getUntrackedFolders());
+		try (Git git = new Git(db)) {
+			IndexDiff diff = new IndexDiff(db, Constants.HEAD,
+					new FileTreeIterator(db));
+			diff.diff();
+			assertEquals(Collections.EMPTY_SET, diff.getUntrackedFolders());
+
+			writeTrashFile("readme", "");
+			writeTrashFile("src/com/A.java", "");
+			writeTrashFile("src/com/B.java", "");
+			writeTrashFile("src/org/A.java", "");
+			writeTrashFile("src/org/B.java", "");
+			writeTrashFile("target/com/A.java", "");
+			writeTrashFile("target/com/B.java", "");
+			writeTrashFile("target/org/A.java", "");
+			writeTrashFile("target/org/B.java", "");
+
+			git.add().addFilepattern("src").addFilepattern("readme").call();
+			git.commit().setMessage("initial").call();
+
+			diff = new IndexDiff(db, Constants.HEAD,
+					new FileTreeIterator(db));
+			diff.diff();
+			assertEquals(new HashSet<String>(Arrays.asList("target")),
+					diff.getUntrackedFolders());
+
+			writeTrashFile("src/tst/A.java", "");
+			writeTrashFile("src/tst/B.java", "");
+
+			diff = new IndexDiff(db, Constants.HEAD, new FileTreeIterator(db));
+			diff.diff();
+			assertEquals(new HashSet<String>(Arrays.asList("target", "src/tst")),
+					diff.getUntrackedFolders());
+
+			git.rm().addFilepattern("src/com/B.java").addFilepattern("src/org")
+					.call();
+			git.commit().setMessage("second").call();
+			writeTrashFile("src/org/C.java", "");
+
+			diff = new IndexDiff(db, Constants.HEAD, new FileTreeIterator(db));
+			diff.diff();
+			assertEquals(
+					new HashSet<String>(Arrays.asList("src/org", "src/tst",
+							"target")),
+					diff.getUntrackedFolders());
+		}
 	}
 
 	/**
@@ -471,85 +475,86 @@ public class IndexDiffTest extends RepositoryTestCase {
 	 */
 	@Test
 	public void testUntrackedNotIgnoredFolders() throws Exception {
-		Git git = new Git(db);
-
-		IndexDiff diff = new IndexDiff(db, Constants.HEAD,
-				new FileTreeIterator(db));
-		diff.diff();
-		assertEquals(Collections.EMPTY_SET, diff.getUntrackedFolders());
-
-		writeTrashFile("readme", "");
-		writeTrashFile("sr/com/X.java", "");
-		writeTrashFile("src/com/A.java", "");
-		writeTrashFile("src/org/B.java", "");
-		writeTrashFile("srcs/org/Y.java", "");
-		writeTrashFile("target/com/A.java", "");
-		writeTrashFile("target/org/B.java", "");
-		writeTrashFile(".gitignore", "/target\n/sr");
-
-		git.add().addFilepattern("readme").addFilepattern(".gitignore")
-				.addFilepattern("srcs/").call();
-		git.commit().setMessage("initial").call();
-
-		diff = new IndexDiff(db, Constants.HEAD, new FileTreeIterator(db));
-		diff.diff();
-		assertEquals(new HashSet<String>(Arrays.asList("src")),
-				diff.getUntrackedFolders());
-
-		git.add().addFilepattern("src").call();
-		writeTrashFile("sr/com/X1.java", "");
-		writeTrashFile("src/tst/A.java", "");
-		writeTrashFile("src/tst/B.java", "");
-		writeTrashFile("srcs/com/Y1.java", "");
-		deleteTrashFile(".gitignore");
-
-		diff = new IndexDiff(db, Constants.HEAD, new FileTreeIterator(db));
-		diff.diff();
-		assertEquals(
-				new HashSet<String>(Arrays.asList("srcs/com", "sr", "src/tst",
-						"target")),
-				diff.getUntrackedFolders());
+		try (Git git = new Git(db)) {
+			IndexDiff diff = new IndexDiff(db, Constants.HEAD,
+					new FileTreeIterator(db));
+			diff.diff();
+			assertEquals(Collections.EMPTY_SET, diff.getUntrackedFolders());
+
+			writeTrashFile("readme", "");
+			writeTrashFile("sr/com/X.java", "");
+			writeTrashFile("src/com/A.java", "");
+			writeTrashFile("src/org/B.java", "");
+			writeTrashFile("srcs/org/Y.java", "");
+			writeTrashFile("target/com/A.java", "");
+			writeTrashFile("target/org/B.java", "");
+			writeTrashFile(".gitignore", "/target\n/sr");
+
+			git.add().addFilepattern("readme").addFilepattern(".gitignore")
+					.addFilepattern("srcs/").call();
+			git.commit().setMessage("initial").call();
+
+			diff = new IndexDiff(db, Constants.HEAD, new FileTreeIterator(db));
+			diff.diff();
+			assertEquals(new HashSet<String>(Arrays.asList("src")),
+					diff.getUntrackedFolders());
+
+			git.add().addFilepattern("src").call();
+			writeTrashFile("sr/com/X1.java", "");
+			writeTrashFile("src/tst/A.java", "");
+			writeTrashFile("src/tst/B.java", "");
+			writeTrashFile("srcs/com/Y1.java", "");
+			deleteTrashFile(".gitignore");
+
+			diff = new IndexDiff(db, Constants.HEAD, new FileTreeIterator(db));
+			diff.diff();
+			assertEquals(
+					new HashSet<String>(Arrays.asList("srcs/com", "sr", "src/tst",
+							"target")),
+					diff.getUntrackedFolders());
+		}
 	}
 
 	@Test
 	public void testAssumeUnchanged() throws Exception {
-		Git git = new Git(db);
-		String path = "file";
-		writeTrashFile(path, "content");
-		git.add().addFilepattern(path).call();
-		String path2 = "file2";
-		writeTrashFile(path2, "content");
-		String path3 = "file3";
-		writeTrashFile(path3, "some content");
-		git.add().addFilepattern(path2).addFilepattern(path3).call();
-		git.commit().setMessage("commit").call();
-		assumeUnchanged(path2);
-		assumeUnchanged(path3);
-		writeTrashFile(path, "more content");
-		deleteTrashFile(path3);
-
-		FileTreeIterator iterator = new FileTreeIterator(db);
-		IndexDiff diff = new IndexDiff(db, Constants.HEAD, iterator);
-		diff.diff();
-		assertEquals(2, diff.getAssumeUnchanged().size());
-		assertEquals(1, diff.getModified().size());
-		assertEquals(0, diff.getChanged().size());
-		assertTrue(diff.getAssumeUnchanged().contains("file2"));
-		assertTrue(diff.getAssumeUnchanged().contains("file3"));
-		assertTrue(diff.getModified().contains("file"));
-
-		git.add().addFilepattern(".").call();
-
-		iterator = new FileTreeIterator(db);
-		diff = new IndexDiff(db, Constants.HEAD, iterator);
-		diff.diff();
-		assertEquals(2, diff.getAssumeUnchanged().size());
-		assertEquals(0, diff.getModified().size());
-		assertEquals(1, diff.getChanged().size());
-		assertTrue(diff.getAssumeUnchanged().contains("file2"));
-		assertTrue(diff.getAssumeUnchanged().contains("file3"));
-		assertTrue(diff.getChanged().contains("file"));
-		assertEquals(Collections.EMPTY_SET, diff.getUntrackedFolders());
+		try (Git git = new Git(db)) {
+			String path = "file";
+			writeTrashFile(path, "content");
+			git.add().addFilepattern(path).call();
+			String path2 = "file2";
+			writeTrashFile(path2, "content");
+			String path3 = "file3";
+			writeTrashFile(path3, "some content");
+			git.add().addFilepattern(path2).addFilepattern(path3).call();
+			git.commit().setMessage("commit").call();
+			assumeUnchanged(path2);
+			assumeUnchanged(path3);
+			writeTrashFile(path, "more content");
+			deleteTrashFile(path3);
+
+			FileTreeIterator iterator = new FileTreeIterator(db);
+			IndexDiff diff = new IndexDiff(db, Constants.HEAD, iterator);
+			diff.diff();
+			assertEquals(2, diff.getAssumeUnchanged().size());
+			assertEquals(1, diff.getModified().size());
+			assertEquals(0, diff.getChanged().size());
+			assertTrue(diff.getAssumeUnchanged().contains("file2"));
+			assertTrue(diff.getAssumeUnchanged().contains("file3"));
+			assertTrue(diff.getModified().contains("file"));
+
+			git.add().addFilepattern(".").call();
+
+			iterator = new FileTreeIterator(db);
+			diff = new IndexDiff(db, Constants.HEAD, iterator);
+			diff.diff();
+			assertEquals(2, diff.getAssumeUnchanged().size());
+			assertEquals(0, diff.getModified().size());
+			assertEquals(1, diff.getChanged().size());
+			assertTrue(diff.getAssumeUnchanged().contains("file2"));
+			assertTrue(diff.getAssumeUnchanged().contains("file3"));
+			assertTrue(diff.getChanged().contains("file"));
+			assertEquals(Collections.EMPTY_SET, diff.getUntrackedFolders());
+		}
 	}
 
 	@Test
@@ -575,147 +580,148 @@ public class IndexDiffTest extends RepositoryTestCase {
 
 	@Test
 	public void testStageState_mergeAndReset_bug() throws Exception {
-		Git git = new Git(db);
-
-		writeTrashFile("a", "content");
-		git.add().addFilepattern("a").call();
-		RevCommit initialCommit = git.commit().setMessage("initial commit")
-				.call();
-
-		// create branch and add a new file
-		final String branchName = Constants.R_HEADS + "branch";
-		createBranch(initialCommit, branchName);
-		checkoutBranch(branchName);
-		writeTrashFile("b", "second file content - branch");
-		git.add().addFilepattern("b").call();
-		RevCommit branchCommit = git.commit().setMessage("branch commit")
-				.call();
-
-		// checkout master and add the same new file
-		checkoutBranch(Constants.R_HEADS + Constants.MASTER);
-		writeTrashFile("b", "second file content - master");
-		git.add().addFilepattern("b").call();
-		git.commit().setMessage("master commit").call();
-
-		// try and merge
-		MergeResult result = git.merge().include(branchCommit).call();
-		assertEquals(MergeStatus.CONFLICTING, result.getMergeStatus());
-
-		FileTreeIterator iterator = new FileTreeIterator(db);
-		IndexDiff diff = new IndexDiff(db, Constants.HEAD, iterator);
-		diff.diff();
-
-		assertTrue(diff.getChanged().isEmpty());
-		assertTrue(diff.getAdded().isEmpty());
-		assertTrue(diff.getRemoved().isEmpty());
-		assertTrue(diff.getMissing().isEmpty());
-		assertTrue(diff.getModified().isEmpty());
-		assertEquals(1, diff.getConflicting().size());
-		assertTrue(diff.getConflicting().contains("b"));
-		assertEquals(StageState.BOTH_ADDED, diff.getConflictingStageStates()
-				.get("b"));
-		assertTrue(diff.getUntrackedFolders().isEmpty());
-
-		// reset file b to its master state without altering the index
-		writeTrashFile("b", "second file content - master");
-
-		// we should have the same result
-		iterator = new FileTreeIterator(db);
-		diff = new IndexDiff(db, Constants.HEAD, iterator);
-		diff.diff();
-
-		assertTrue(diff.getChanged().isEmpty());
-		assertTrue(diff.getAdded().isEmpty());
-		assertTrue(diff.getRemoved().isEmpty());
-		assertTrue(diff.getMissing().isEmpty());
-		assertTrue(diff.getModified().isEmpty());
-		assertEquals(1, diff.getConflicting().size());
-		assertTrue(diff.getConflicting().contains("b"));
-		assertEquals(StageState.BOTH_ADDED, diff.getConflictingStageStates()
-				.get("b"));
-		assertTrue(diff.getUntrackedFolders().isEmpty());
+		try (Git git = new Git(db)) {
+			writeTrashFile("a", "content");
+			git.add().addFilepattern("a").call();
+			RevCommit initialCommit = git.commit().setMessage("initial commit")
+					.call();
+
+			// create branch and add a new file
+			final String branchName = Constants.R_HEADS + "branch";
+			createBranch(initialCommit, branchName);
+			checkoutBranch(branchName);
+			writeTrashFile("b", "second file content - branch");
+			git.add().addFilepattern("b").call();
+			RevCommit branchCommit = git.commit().setMessage("branch commit")
+					.call();
+
+			// checkout master and add the same new file
+			checkoutBranch(Constants.R_HEADS + Constants.MASTER);
+			writeTrashFile("b", "second file content - master");
+			git.add().addFilepattern("b").call();
+			git.commit().setMessage("master commit").call();
+
+			// try and merge
+			MergeResult result = git.merge().include(branchCommit).call();
+			assertEquals(MergeStatus.CONFLICTING, result.getMergeStatus());
+
+			FileTreeIterator iterator = new FileTreeIterator(db);
+			IndexDiff diff = new IndexDiff(db, Constants.HEAD, iterator);
+			diff.diff();
+
+			assertTrue(diff.getChanged().isEmpty());
+			assertTrue(diff.getAdded().isEmpty());
+			assertTrue(diff.getRemoved().isEmpty());
+			assertTrue(diff.getMissing().isEmpty());
+			assertTrue(diff.getModified().isEmpty());
+			assertEquals(1, diff.getConflicting().size());
+			assertTrue(diff.getConflicting().contains("b"));
+			assertEquals(StageState.BOTH_ADDED, diff.getConflictingStageStates()
+					.get("b"));
+			assertTrue(diff.getUntrackedFolders().isEmpty());
+
+			// reset file b to its master state without altering the index
+			writeTrashFile("b", "second file content - master");
+
+			// we should have the same result
+			iterator = new FileTreeIterator(db);
+			diff = new IndexDiff(db, Constants.HEAD, iterator);
+			diff.diff();
+
+			assertTrue(diff.getChanged().isEmpty());
+			assertTrue(diff.getAdded().isEmpty());
+			assertTrue(diff.getRemoved().isEmpty());
+			assertTrue(diff.getMissing().isEmpty());
+			assertTrue(diff.getModified().isEmpty());
+			assertEquals(1, diff.getConflicting().size());
+			assertTrue(diff.getConflicting().contains("b"));
+			assertEquals(StageState.BOTH_ADDED, diff.getConflictingStageStates()
+					.get("b"));
+			assertTrue(diff.getUntrackedFolders().isEmpty());
+		}
 	}
 
 	@Test
 	public void testStageState_simulated_bug() throws Exception {
-		Git git = new Git(db);
-
-		writeTrashFile("a", "content");
-		git.add().addFilepattern("a").call();
-		RevCommit initialCommit = git.commit().setMessage("initial commit")
-				.call();
-
-		// create branch and add a new file
-		final String branchName = Constants.R_HEADS + "branch";
-		createBranch(initialCommit, branchName);
-		checkoutBranch(branchName);
-		writeTrashFile("b", "second file content - branch");
-		git.add().addFilepattern("b").call();
-		git.commit().setMessage("branch commit")
-				.call();
-
-		// checkout master and add the same new file
-		checkoutBranch(Constants.R_HEADS + Constants.MASTER);
-		writeTrashFile("b", "second file content - master");
-		git.add().addFilepattern("b").call();
-		git.commit().setMessage("master commit").call();
-
-		// Simulate a failed merge of branch into master
-		DirCacheBuilder builder = db.lockDirCache().builder();
-		DirCacheEntry entry = createEntry("a", FileMode.REGULAR_FILE, 0,
-				"content");
-		builder.add(entry);
-		entry = createEntry("b", FileMode.REGULAR_FILE, 2,
-				"second file content - master");
-		builder.add(entry);
-		entry = createEntry("b", FileMode.REGULAR_FILE, 3,
-				"second file content - branch");
-		builder.add(entry);
-		builder.commit();
-
-		FileTreeIterator iterator = new FileTreeIterator(db);
-		IndexDiff diff = new IndexDiff(db, Constants.HEAD, iterator);
-		diff.diff();
-
-		assertTrue(diff.getChanged().isEmpty());
-		assertTrue(diff.getAdded().isEmpty());
-		assertTrue(diff.getRemoved().isEmpty());
-		assertTrue(diff.getMissing().isEmpty());
-		assertTrue(diff.getModified().isEmpty());
-		assertEquals(1, diff.getConflicting().size());
-		assertTrue(diff.getConflicting().contains("b"));
-		assertEquals(StageState.BOTH_ADDED, diff.getConflictingStageStates()
-				.get("b"));
-		assertTrue(diff.getUntrackedFolders().isEmpty());
+		try (Git git = new Git(db)) {
+			writeTrashFile("a", "content");
+			git.add().addFilepattern("a").call();
+			RevCommit initialCommit = git.commit().setMessage("initial commit")
+					.call();
+
+			// create branch and add a new file
+			final String branchName = Constants.R_HEADS + "branch";
+			createBranch(initialCommit, branchName);
+			checkoutBranch(branchName);
+			writeTrashFile("b", "second file content - branch");
+			git.add().addFilepattern("b").call();
+			git.commit().setMessage("branch commit")
+					.call();
+
+			// checkout master and add the same new file
+			checkoutBranch(Constants.R_HEADS + Constants.MASTER);
+			writeTrashFile("b", "second file content - master");
+			git.add().addFilepattern("b").call();
+			git.commit().setMessage("master commit").call();
+
+			// Simulate a failed merge of branch into master
+			DirCacheBuilder builder = db.lockDirCache().builder();
+			DirCacheEntry entry = createEntry("a", FileMode.REGULAR_FILE, 0,
+					"content");
+			builder.add(entry);
+			entry = createEntry("b", FileMode.REGULAR_FILE, 2,
+					"second file content - master");
+			builder.add(entry);
+			entry = createEntry("b", FileMode.REGULAR_FILE, 3,
+					"second file content - branch");
+			builder.add(entry);
+			builder.commit();
+
+			FileTreeIterator iterator = new FileTreeIterator(db);
+			IndexDiff diff = new IndexDiff(db, Constants.HEAD, iterator);
+			diff.diff();
+
+			assertTrue(diff.getChanged().isEmpty());
+			assertTrue(diff.getAdded().isEmpty());
+			assertTrue(diff.getRemoved().isEmpty());
+			assertTrue(diff.getMissing().isEmpty());
+			assertTrue(diff.getModified().isEmpty());
+			assertEquals(1, diff.getConflicting().size());
+			assertTrue(diff.getConflicting().contains("b"));
+			assertEquals(StageState.BOTH_ADDED, diff.getConflictingStageStates()
+					.get("b"));
+			assertTrue(diff.getUntrackedFolders().isEmpty());
+		}
 	}
 
 	@Test
 	public void testAutoCRLFInput() throws Exception {
-		Git git = new Git(db);
-		FileBasedConfig config = db.getConfig();
-
-		// Make sure core.autocrlf is false before adding
-		config.setEnum(ConfigConstants.CONFIG_CORE_SECTION, null,
-				ConfigConstants.CONFIG_KEY_AUTOCRLF, AutoCRLF.FALSE);
-		config.save();
-
-		// File is already in repository with CRLF
-		writeTrashFile("crlf.txt", "this\r\ncontains\r\ncrlf\r\n");
-		git.add().addFilepattern("crlf.txt").call();
-		git.commit().setMessage("Add crlf.txt").call();
-
-		// Now set core.autocrlf to input
-		config.setEnum(ConfigConstants.CONFIG_CORE_SECTION, null,
-				ConfigConstants.CONFIG_KEY_AUTOCRLF, AutoCRLF.INPUT);
-		config.save();
-
-		FileTreeIterator iterator = new FileTreeIterator(db);
-		IndexDiff diff = new IndexDiff(db, Constants.HEAD, iterator);
-		diff.diff();
-
-		assertTrue(
-				"Expected no modified files, but there were: "
-						+ diff.getModified(), diff.getModified().isEmpty());
+		try (Git git = new Git(db)) {
+			FileBasedConfig config = db.getConfig();
+
+			// Make sure core.autocrlf is false before adding
+			config.setEnum(ConfigConstants.CONFIG_CORE_SECTION, null,
+					ConfigConstants.CONFIG_KEY_AUTOCRLF, AutoCRLF.FALSE);
+			config.save();
+
+			// File is already in repository with CRLF
+			writeTrashFile("crlf.txt", "this\r\ncontains\r\ncrlf\r\n");
+			git.add().addFilepattern("crlf.txt").call();
+			git.commit().setMessage("Add crlf.txt").call();
+
+			// Now set core.autocrlf to input
+			config.setEnum(ConfigConstants.CONFIG_CORE_SECTION, null,
+					ConfigConstants.CONFIG_KEY_AUTOCRLF, AutoCRLF.INPUT);
+			config.save();
+
+			FileTreeIterator iterator = new FileTreeIterator(db);
+			IndexDiff diff = new IndexDiff(db, Constants.HEAD, iterator);
+			diff.diff();
+
+			assertTrue(
+					"Expected no modified files, but there were: "
+							+ diff.getModified(), diff.getModified().isEmpty());
+		}
 	}
 
 	private void verifyStageState(StageState expected, int... stages)

org.eclipse.jgit.test/tst/org/eclipse/jgit/lib/IndexModificationTimesTest.java

@@ -49,80 +49,81 @@ public class IndexModificationTimesTest extends RepositoryTestCase {
 
 	@Test
 	public void testLastModifiedTimes() throws Exception {
-		Git git = new Git(db);
-		String path = "file";
-		writeTrashFile(path, "content");
-		String path2 = "file2";
-		writeTrashFile(path2, "content2");
+		try (Git git = new Git(db)) {
+			String path = "file";
+			writeTrashFile(path, "content");
+			String path2 = "file2";
+			writeTrashFile(path2, "content2");
 
-		git.add().addFilepattern(path).call();
-		git.add().addFilepattern(path2).call();
-		git.commit().setMessage("commit").call();
+			git.add().addFilepattern(path).call();
+			git.add().addFilepattern(path2).call();
+			git.commit().setMessage("commit").call();
 
-		DirCache dc = db.readDirCache();
-		DirCacheEntry entry = dc.getEntry(path);
-		DirCacheEntry entry2 = dc.getEntry(path);
+			DirCache dc = db.readDirCache();
+			DirCacheEntry entry = dc.getEntry(path);
+			DirCacheEntry entry2 = dc.getEntry(path);
 
-		assertTrue("last modified shall not be zero!",
-				entry.getLastModified() != 0);
+			assertTrue("last modified shall not be zero!",
+					entry.getLastModified() != 0);
 
-		assertTrue("last modified shall not be zero!",
-				entry2.getLastModified() != 0);
+			assertTrue("last modified shall not be zero!",
+					entry2.getLastModified() != 0);
 
-		writeTrashFile(path, "new content");
-		git.add().addFilepattern(path).call();
-		git.commit().setMessage("commit2").call();
+			writeTrashFile(path, "new content");
+			git.add().addFilepattern(path).call();
+			git.commit().setMessage("commit2").call();
 
-		dc = db.readDirCache();
-		entry = dc.getEntry(path);
-		entry2 = dc.getEntry(path);
+			dc = db.readDirCache();
+			entry = dc.getEntry(path);
+			entry2 = dc.getEntry(path);
 
-		assertTrue("last modified shall not be zero!",
-				entry.getLastModified() != 0);
+			assertTrue("last modified shall not be zero!",
+					entry.getLastModified() != 0);
 
-		assertTrue("last modified shall not be zero!",
-				entry2.getLastModified() != 0);
+			assertTrue("last modified shall not be zero!",
+					entry2.getLastModified() != 0);
+		}
 	}
 
 	@Test
 	public void testModify() throws Exception {
-		Git git = new Git(db);
-		String path = "file";
-		writeTrashFile(path, "content");
+		try (Git git = new Git(db)) {
+			String path = "file";
+			writeTrashFile(path, "content");
 
-		git.add().addFilepattern(path).call();
-		git.commit().setMessage("commit").call();
+			git.add().addFilepattern(path).call();
+			git.commit().setMessage("commit").call();
 
-		DirCache dc = db.readDirCache();
-		DirCacheEntry entry = dc.getEntry(path);
+			DirCache dc = db.readDirCache();
+			DirCacheEntry entry = dc.getEntry(path);
 
-		long masterLastMod = entry.getLastModified();
+			long masterLastMod = entry.getLastModified();
 
-		git.checkout().setCreateBranch(true).setName("side").call();
+			git.checkout().setCreateBranch(true).setName("side").call();
 
-		Thread.sleep(10);
-		String path2 = "file2";
-		writeTrashFile(path2, "side content");
-		git.add().addFilepattern(path2).call();
-		git.commit().setMessage("commit").call();
+			Thread.sleep(10);
+			String path2 = "file2";
+			writeTrashFile(path2, "side content");
+			git.add().addFilepattern(path2).call();
+			git.commit().setMessage("commit").call();
 
-		dc = db.readDirCache();
-		entry = dc.getEntry(path);
+			dc = db.readDirCache();
+			entry = dc.getEntry(path);
 
-		long sideLastMode = entry.getLastModified();
+			long sideLastMode = entry.getLastModified();
 
-		Thread.sleep(2000);
+			Thread.sleep(2000);
 
-		writeTrashFile(path, "uncommitted content");
-		git.checkout().setName("master").call();
+			writeTrashFile(path, "uncommitted content");
+			git.checkout().setName("master").call();
 
-		dc = db.readDirCache();
-		entry = dc.getEntry(path);
-
-		assertTrue("shall have equal mod time!", masterLastMod == sideLastMode);
-		assertTrue("shall not equal master timestamp!",
-				entry.getLastModified() == masterLastMod);
+			dc = db.readDirCache();
+			entry = dc.getEntry(path);
 
+			assertTrue("shall have equal mod time!", masterLastMod == sideLastMode);
+			assertTrue("shall not equal master timestamp!",
+					entry.getLastModified() == masterLastMod);
+		}
 	}
 
 }

org.eclipse.jgit.test/tst/org/eclipse/jgit/merge/MergeAlgorithmTest.java

@@ -259,7 +259,7 @@ public class MergeAlgorithmTest {
 	}
 
 	private String merge(String commonBase, String ours, String theirs) throws IOException {
-		MergeResult r = new MergeAlgorithm().merge(RawTextComparator.DEFAULT,
+		MergeResult<RawText> r = new MergeAlgorithm().merge(RawTextComparator.DEFAULT,
 				T(commonBase), T(ours), T(theirs));
 		ByteArrayOutputStream bo=new ByteArrayOutputStream(50);
 		fmt.formatMerge(bo, r, "B", "O", "T", Constants.CHARACTER_ENCODING);

org.eclipse.jgit.test/tst/org/eclipse/jgit/treewalk/ForPathTest.java

@@ -84,21 +84,22 @@ public class ForPathTest extends RepositoryTestCase {
 			ObjectId tree = tree0.writeTree(oi);
 
 			// Find the directories that were implicitly created above.
-			TreeWalk tw = new TreeWalk(or);
-			tw.addTree(tree);
 			ObjectId a = null;
 			ObjectId aSlashC = null;
-			while (tw.next()) {
-				if (tw.getPathString().equals("a")) {
-					a = tw.getObjectId(0);
-					tw.enterSubtree();
-					while (tw.next()) {
-						if (tw.getPathString().equals("a/c")) {
-							aSlashC = tw.getObjectId(0);
-							break;
+			try (TreeWalk tw = new TreeWalk(or)) {
+				tw.addTree(tree);
+				while (tw.next()) {
+					if (tw.getPathString().equals("a")) {
+						a = tw.getObjectId(0);
+						tw.enterSubtree();
+						while (tw.next()) {
+							if (tw.getPathString().equals("a/c")) {
+								aSlashC = tw.getObjectId(0);
+								break;
+							}
 						}
+						break;
 					}
-					break;
 				}
 			}
 

org.eclipse.jgit.test/tst/org/eclipse/jgit/treewalk/filter/InterIndexDiffFilterTest.java

@@ -76,10 +76,11 @@ public class InterIndexDiffFilterTest extends LocalDiskRepositoryTestCase {
 	public void testEmpty() throws IOException {
 		DirCache dc1 = DirCache.newInCore();
 		DirCache dc2 = DirCache.newInCore();
-		TreeWalk tw = new TreeWalk(db);
-		tw.addTree(new DirCacheIterator(dc1));
-		tw.addTree(new DirCacheIterator(dc2));
-		assertFalse(tw.next());
+		try (TreeWalk tw = new TreeWalk(db)) {
+			tw.addTree(new DirCacheIterator(dc1));
+			tw.addTree(new DirCacheIterator(dc2));
+			assertFalse(tw.next());
+		}
 	}
 
 	static final class AddEdit extends PathEdit {
@@ -124,14 +125,15 @@ public class InterIndexDiffFilterTest extends LocalDiskRepositoryTestCase {
 		editor.add(new AddEdit("a/a", FileMode.REGULAR_FILE, id("a"), 1, false));
 		editor.finish();
 
-		TreeWalk tw = new TreeWalk(db);
-		tw.setRecursive(true);
-		tw.addTree(new DirCacheIterator(dc1));
-		tw.addTree(new DirCacheIterator(dc2));
-		tw.setFilter(InterIndexDiffFilter.INSTANCE);
-		assertTrue(tw.next());
-		assertEquals("a/a", tw.getPathString());
-		assertFalse(tw.next());
+		try (TreeWalk tw = new TreeWalk(db)) {
+			tw.setRecursive(true);
+			tw.addTree(new DirCacheIterator(dc1));
+			tw.addTree(new DirCacheIterator(dc2));
+			tw.setFilter(InterIndexDiffFilter.INSTANCE);
+			assertTrue(tw.next());
+			assertEquals("a/a", tw.getPathString());
+			assertFalse(tw.next());
+		}
 	}
 
 	@Test
@@ -145,13 +147,14 @@ public class InterIndexDiffFilterTest extends LocalDiskRepositoryTestCase {
 		ed2.add(new AddEdit("a/a", FileMode.REGULAR_FILE, id("a"), 1, false));
 		ed2.finish();
 
-		TreeWalk tw = new TreeWalk(db);
-		tw.setRecursive(true);
-		tw.addTree(new DirCacheIterator(dc1));
-		tw.addTree(new DirCacheIterator(dc2));
-		tw.setFilter(InterIndexDiffFilter.INSTANCE);
+		try (TreeWalk tw = new TreeWalk(db)) {
+			tw.setRecursive(true);
+			tw.addTree(new DirCacheIterator(dc1));
+			tw.addTree(new DirCacheIterator(dc2));
+			tw.setFilter(InterIndexDiffFilter.INSTANCE);
 
-		assertFalse(tw.next());
+			assertFalse(tw.next());
+		}
 	}
 
 	@Test
@@ -165,15 +168,16 @@ public class InterIndexDiffFilterTest extends LocalDiskRepositoryTestCase {
 		ed2.add(new AddEdit("a/a", FileMode.REGULAR_FILE, id("a"), 1, true));
 		ed2.finish();
 
-		TreeWalk tw = new TreeWalk(db);
-		tw.setRecursive(true);
-		tw.addTree(new DirCacheIterator(dc1));
-		tw.addTree(new DirCacheIterator(dc2));
-		tw.setFilter(InterIndexDiffFilter.INSTANCE);
+		try (TreeWalk tw = new TreeWalk(db)) {
+			tw.setRecursive(true);
+			tw.addTree(new DirCacheIterator(dc1));
+			tw.addTree(new DirCacheIterator(dc2));
+			tw.setFilter(InterIndexDiffFilter.INSTANCE);
 
-		assertTrue(tw.next());
-		assertEquals("a/a", tw.getPathString());
-		assertFalse(tw.next());
+			assertTrue(tw.next());
+			assertEquals("a/a", tw.getPathString());
+			assertFalse(tw.next());
+		}
 	}
 
 	@Test
@@ -188,12 +192,13 @@ public class InterIndexDiffFilterTest extends LocalDiskRepositoryTestCase {
 		ed2.add(new AddEdit("a/a", FileMode.REGULAR_FILE, id("b"), 1, true));
 		ed2.finish();
 
-		TreeWalk tw = new TreeWalk(db);
-		tw.setRecursive(true);
-		tw.addTree(new DirCacheIterator(dc1));
-		tw.addTree(new DirCacheIterator(dc2));
-		tw.setFilter(InterIndexDiffFilter.INSTANCE);
+		try (TreeWalk tw = new TreeWalk(db)) {
+			tw.setRecursive(true);
+			tw.addTree(new DirCacheIterator(dc1));
+			tw.addTree(new DirCacheIterator(dc2));
+			tw.setFilter(InterIndexDiffFilter.INSTANCE);
 
-		assertFalse(tw.next());
+			assertFalse(tw.next());
+		}
 	}
 }

org.eclipse.jgit/src/org/eclipse/jgit/dircache/DirCache.java

@@ -344,9 +344,6 @@ public class DirCache {
 	/** Our active lock (if we hold it); null if we don't have it locked. */
 	private LockFile myLock;
 
-	/** file system abstraction **/
-	private final FS fs;
-
 	/** Keep track of whether the index has changed or not */
 	private FileSnapshot snapshot;
 
@@ -376,7 +373,6 @@ public class DirCache {
 	 */
 	public DirCache(final File indexLocation, final FS fs) {
 		liveFile = indexLocation;
-		this.fs = fs;
 		clear();
 	}
 
@@ -611,7 +607,7 @@ public class DirCache {
 	public boolean lock() throws IOException {
 		if (liveFile == null)
 			throw new IOException(JGitText.get().dirCacheDoesNotHaveABackingFile);
-		final LockFile tmp = new LockFile(liveFile, fs);
+		final LockFile tmp = new LockFile(liveFile);
 		if (tmp.lock()) {
 			tmp.setNeedStatInformation(true);
 			myLock = tmp;

org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/dfs/InMemoryRepository.java

@@ -274,7 +274,7 @@ public class InMemoryRepository extends DfsRepository {
 					if (performsAtomicTransactions()) {
 						try {
 							lock.writeLock().lock();
-							batch(walk, getCommands());
+							batch(getCommands());
 						} finally {
 							lock.writeLock().unlock();
 						}
@@ -304,7 +304,7 @@ public class InMemoryRepository extends DfsRepository {
 			return new RefCache(ids.toRefList(), sym.toRefList());
 		}
 
-		private void batch(RevWalk walk, List<ReceiveCommand> cmds) {
+		private void batch(List<ReceiveCommand> cmds) {
 			// Validate that the target exists in a new RevWalk, as the RevWalk
 			// from the RefUpdate might be reading back unflushed objects.
 			Map<ObjectId, ObjectId> peeled = new HashMap<>();

org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/FileRepository.java

@@ -354,7 +354,7 @@ public class FileRepository extends Repository {
 						ConfigConstants.CONFIG_KEY_WORKTREE, getWorkTree()
 								.getAbsolutePath());
 				LockFile dotGitLockFile = new LockFile(new File(workTree,
-						Constants.DOT_GIT), getFS());
+						Constants.DOT_GIT));
 				try {
 					if (dotGitLockFile.lock()) {
 						dotGitLockFile.write(Constants.encode(Constants.GITDIR

org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/PackLock.java

@@ -53,7 +53,6 @@ import org.eclipse.jgit.util.FileUtils;
 /** Keeps track of a {@link PackFile}'s associated <code>.keep</code> file. */
 public class PackLock {
 	private final File keepFile;
-	private final FS fs;
 
 	/**
 	 * Create a new lock for a pack file.
@@ -67,7 +66,6 @@ public class PackLock {
 		final File p = packFile.getParentFile();
 		final String n = packFile.getName();
 		keepFile = new File(p, n.substring(0, n.length() - 5) + ".keep"); //$NON-NLS-1$
-		this.fs = fs;
 	}
 
 	/**
@@ -84,7 +82,7 @@ public class PackLock {
 			return false;
 		if (!msg.endsWith("\n")) //$NON-NLS-1$
 			msg += "\n"; //$NON-NLS-1$
-		final LockFile lf = new LockFile(keepFile, fs);
+		final LockFile lf = new LockFile(keepFile);
 		if (!lf.lock())
 			return false;
 		lf.write(Constants.encode(msg));

org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/RefDirectory.java

@@ -588,8 +588,7 @@ public class RefDirectory extends RefDatabase {
 		// we don't miss an edit made externally.
 		final PackedRefList packed = getPackedRefs();
 		if (packed.contains(name)) {
-			LockFile lck = new LockFile(packedRefsFile,
-					update.getRepository().getFS());
+			LockFile lck = new LockFile(packedRefsFile);
 			if (!lck.lock())
 				throw new LockFailedException(packedRefsFile);
 			try {
@@ -639,7 +638,7 @@ public class RefDirectory extends RefDatabase {
 		FS fs = parent.getFS();
 
 		// Lock the packed refs file and read the content
-		LockFile lck = new LockFile(packedRefsFile, fs);
+		LockFile lck = new LockFile(packedRefsFile);
 		if (!lck.lock())
 			throw new IOException(MessageFormat.format(
 					JGitText.get().cannotLock, packedRefsFile));
@@ -670,8 +669,7 @@ public class RefDirectory extends RefDatabase {
 				File refFile = fileFor(refName);
 				if (!fs.exists(refFile))
 					continue;
-				LockFile rLck = new LockFile(refFile,
-						parent.getFS());
+				LockFile rLck = new LockFile(refFile);
 				if (!rLck.lock())
 					continue;
 				try {

org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/RefDirectoryUpdate.java

@@ -79,7 +79,7 @@ class RefDirectoryUpdate extends RefUpdate {
 		if (deref)
 			dst = dst.getLeaf();
 		String name = dst.getName();
-		lock = new LockFile(database.fileFor(name), getRepository().getFS());
+		lock = new LockFile(database.fileFor(name));
 		if (lock.lock()) {
 			dst = database.getRef(name);
 			setOldObjectId(dst != null ? dst.getObjectId() : null);

org.eclipse.jgit/src/org/eclipse/jgit/merge/MergeFormatter.java

@@ -102,7 +102,7 @@ public class MergeFormatter {
 	 *            metadata
 	 * @throws IOException
 	 */
-	public void formatMerge(OutputStream out, MergeResult res, String baseName,
+	public void formatMerge(OutputStream out, MergeResult<RawText> res, String baseName,
 			String oursName, String theirsName, String charsetName) throws IOException {
 		List<String> names = new ArrayList<String>(3);
 		names.add(baseName);

org.eclipse.jgit/src/org/eclipse/jgit/storage/file/FileBasedConfig.java

@@ -74,8 +74,6 @@ import org.eclipse.jgit.util.RawParseUtils;
 public class FileBasedConfig extends StoredConfig {
 	private final File configFile;
 
-	private final FS fs;
-
 	private boolean utf8Bom;
 
 	private volatile FileSnapshot snapshot;
@@ -109,7 +107,6 @@ public class FileBasedConfig extends StoredConfig {
 	public FileBasedConfig(Config base, File cfgLocation, FS fs) {
 		super(base);
 		configFile = cfgLocation;
-		this.fs = fs;
 		this.snapshot = FileSnapshot.DIRTY;
 		this.hash = ObjectId.zeroId();
 	}
@@ -203,7 +200,7 @@ public class FileBasedConfig extends StoredConfig {
 			out = Constants.encode(text);
 		}
 
-		final LockFile lf = new LockFile(getFile(), fs);
+		final LockFile lf = new LockFile(getFile());
 		if (!lf.lock())
 			throw new LockFailedException(getFile());
 		try {

org.eclipse.jgit/src/org/eclipse/jgit/transport/FetchProcess.java

@@ -314,8 +314,7 @@ class FetchProcess {
 		File meta = transport.local.getDirectory();
 		if (meta == null)
 			return;
-		final LockFile lock = new LockFile(new File(meta, "FETCH_HEAD"), //$NON-NLS-1$
-				transport.local.getFS());
+		final LockFile lock = new LockFile(new File(meta, "FETCH_HEAD")); //$NON-NLS-1$
 		try {
 			if (lock.lock()) {
 				final Writer w = new OutputStreamWriter(lock.getOutputStream());