ArchiveTest: Open auto-closeable resources in try-with-resource

Change-Id: If11017f21027b46c7a66e52e4bc0cc73f4fbdc07
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>

org.eclipse.jgit.pgm.test/tst/org/eclipse/jgit/pgm/ArchiveTest.java

@@ -633,9 +633,8 @@ public class ArchiveTest extends CLIRepositoryTestCase {
 	}
 
 	private void assertMagic(long offset, byte[] magicBytes, File file) throws Exception {
-		BufferedInputStream in = new BufferedInputStream(
+		try (BufferedInputStream in = new BufferedInputStream(
-				new FileInputStream(file));
+				new FileInputStream(file))) {
-		try {
 			if (offset > 0) {
 				long skipped = in.skip(offset);
 				assertEquals(offset, skipped);
@@ -644,8 +643,6 @@ public class ArchiveTest extends CLIRepositoryTestCase {
 			byte[] actual = new byte[magicBytes.length];
 			in.read(actual);
 			assertArrayEquals(magicBytes, actual);
-		} finally {
-			in.close();
 		}
 	}
 
@@ -686,23 +683,19 @@ public class ArchiveTest extends CLIRepositoryTestCase {
 	private void writeRaw(String filename, byte[] data)
 			throws IOException {
 		File path = new File(db.getWorkTree(), filename);
-		OutputStream out = new FileOutputStream(path);
+		try (OutputStream out = new FileOutputStream(path)) {
-		try {
 			out.write(data);
-		} finally {
-			out.close();
 		}
 	}
 
 	private static String[] listZipEntries(byte[] zipData) throws IOException {
 		List<String> l = new ArrayList<>();
-		ZipInputStream in = new ZipInputStream(
+		try (ZipInputStream in = new ZipInputStream(
-				new ByteArrayInputStream(zipData));
+				new ByteArrayInputStream(zipData))) {
-
 			ZipEntry e;
 			while ((e = in.getNextEntry()) != null)
 				l.add(e.getName());
-		in.close();
+		}
 		return l.toArray(new String[l.size()]);
 	}
 
@@ -725,7 +718,7 @@ public class ArchiveTest extends CLIRepositoryTestCase {
 	private String[] listTarEntries(byte[] tarData) throws Exception {
 		List<String> l = new ArrayList<>();
 		Process proc = spawnAssumingCommandPresent("tar", "tf", "-");
-		BufferedReader reader = readFromProcess(proc);
+		try (BufferedReader reader = readFromProcess(proc)) {
 			OutputStream out = proc.getOutputStream();
 
 			// Dump tarball to tar stdin in background
@@ -739,10 +732,10 @@ public class ArchiveTest extends CLIRepositoryTestCase {
 				return l.toArray(new String[l.size()]);
 			} finally {
 				writing.get();
-			reader.close();
 				proc.destroy();
 			}
 		}
+	}
 
 	private static String[] zipEntryContent(byte[] zipData, String path)
 			throws IOException {
@@ -771,7 +764,7 @@ public class ArchiveTest extends CLIRepositoryTestCase {
 			throws Exception {
 		List<String> l = new ArrayList<>();
 		Process proc = spawnAssumingCommandPresent("tar", "Oxf", "-", path);
-		BufferedReader reader = readFromProcess(proc);
+		try (BufferedReader reader = readFromProcess(proc)) {
 			OutputStream out = proc.getOutputStream();
 			Future<?> writing = writeAsync(out, tarData);
 
@@ -783,8 +776,8 @@ public class ArchiveTest extends CLIRepositoryTestCase {
 				return l.toArray(new String[l.size()]);
 			} finally {
 				writing.get();
-			reader.close();
 				proc.destroy();
 			}
 		}
 	}
+}