Merge changes from topic 'try-with-resource'

* changes:
  DiffCommand: Open DiffFormatter in try-with-resource
  DiffAlgorithms: Open Repository in try-with-resource
  DescribeCommandTest: Open FileWriter in try-with-resource
  CommitCommand: Open InputStream in try-with-resource
  DefaultNoteMerger: Open UnionInputStream in try-with-resource

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

@@ -160,11 +160,8 @@ class DiffAlgorithms extends TextBuiltin {
 			else
 				rb.findGitDir(dir);
 
-			Repository repo = rb.build();
-			try {
+			try (Repository repo = rb.build()) {
 				run(repo);
-			} finally {
-				repo.close();
 			}
 		}
 	}

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

@@ -297,9 +297,9 @@ public class DescribeCommandTest extends RepositoryTestCase {
 	}
 
 	private static void touch(File f, String contents) throws Exception {
-		FileWriter w = new FileWriter(f);
-		w.write(contents);
-		w.close();
+		try (FileWriter w = new FileWriter(f)) {
+			w.write(contents);
+		}
 	}
 
 	private String describe(ObjectId c1, boolean longDesc)

org.eclipse.jgit/src/org/eclipse/jgit/api/CommitCommand.java

@@ -409,14 +409,11 @@ public class CommitCommand extends GitCommand<RevCommit> {
 									inserter = repo.newObjectInserter();
 								long contentLength = fTree
 										.getEntryContentLength();
-								InputStream inputStream = fTree
-										.openEntryStream();
-								try {
+								try (InputStream inputStream = fTree
+										.openEntryStream()) {
 									dcEntry.setObjectId(inserter.insert(
 											Constants.OBJ_BLOB, contentLength,
 											inputStream));
-								} finally {
-									inputStream.close();
 								}
 							}
 						}

org.eclipse.jgit/src/org/eclipse/jgit/api/DiffCommand.java

@@ -104,6 +104,12 @@ public class DiffCommand extends GitCommand<List<DiffEntry>> {
 		super(repo);
 	}
 
+	private DiffFormatter getDiffFormatter() {
+		return out != null && !showNameAndStatusOnly
+				? new DiffFormatter(new BufferedOutputStream(out))
+				: new DiffFormatter(NullOutputStream.INSTANCE);
+	}
+
 	/**
 	 * {@inheritDoc}
 	 * <p>
@@ -114,14 +120,9 @@ public class DiffCommand extends GitCommand<List<DiffEntry>> {
 	 */
 	@Override
 	public List<DiffEntry> call() throws GitAPIException {
-		final DiffFormatter diffFmt;
-		if (out != null && !showNameAndStatusOnly)
-			diffFmt = new DiffFormatter(new BufferedOutputStream(out));
-		else
-			diffFmt = new DiffFormatter(NullOutputStream.INSTANCE);
-		diffFmt.setRepository(repo);
-		diffFmt.setProgressMonitor(monitor);
-		try {
+		try (DiffFormatter diffFmt = getDiffFormatter()) {
+			diffFmt.setRepository(repo);
+			diffFmt.setProgressMonitor(monitor);
 			if (cached) {
 				if (oldTree == null) {
 					ObjectId head = repo.resolve(HEAD + "^{tree}"); //$NON-NLS-1$
@@ -159,8 +160,6 @@ public class DiffCommand extends GitCommand<List<DiffEntry>> {
 			}
 		} catch (IOException e) {
 			throw new JGitInternalException(e.getMessage(), e);
-		} finally {
-			diffFmt.close();
 		}
 	}
 

org.eclipse.jgit/src/org/eclipse/jgit/notes/DefaultNoteMerger.java

@@ -82,14 +82,11 @@ public class DefaultNoteMerger implements NoteMerger {
 
 		ObjectLoader lo = reader.open(ours.getData());
 		ObjectLoader lt = reader.open(theirs.getData());
-		UnionInputStream union = new UnionInputStream(lo.openStream(),
-				lt.openStream());
-		try {
+		try (UnionInputStream union = new UnionInputStream(lo.openStream(),
+				lt.openStream())) {
 			ObjectId noteData = inserter.insert(Constants.OBJ_BLOB,
 					lo.getSize() + lt.getSize(), union);
 			return new Note(ours, noteData);
-		} finally {
-			union.close();
 		}
 	}
 }