PackFileTest: Open ObjectInserter.Formatter in try-with-resource

Change-Id: I9c56b5efdb9c13b929073a786092a707fca21281
Signed-off-by: David Pursehouse <david.pursehouse@sonymobile.com>

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

@@ -191,7 +191,7 @@ public class PackFileTest extends LocalDiskRepositoryTestCase {
 
 	@Test
 	public void testDelta_SmallObjectChain() throws Exception {
-		ObjectInserter.Formatter fmt = new ObjectInserter.Formatter();
+		try (ObjectInserter.Formatter fmt = new ObjectInserter.Formatter()) {
 			byte[] data0 = new byte[512];
 			Arrays.fill(data0, (byte) 0xf3);
 			ObjectId id0 = fmt.idFor(Constants.OBJ_BLOB, data0);
@@ -247,10 +247,11 @@ public class PackFileTest extends LocalDiskRepositoryTestCase {
 			assertEquals("stream at EOF", -1, in.read());
 			in.close();
 		}
+	}
 
 	@Test
 	public void testDelta_FailsOver2GiB() throws Exception {
-		ObjectInserter.Formatter fmt = new ObjectInserter.Formatter();
+		try (ObjectInserter.Formatter fmt = new ObjectInserter.Formatter()) {
 			byte[] base = new byte[] { 'a' };
 			ObjectId idA = fmt.idFor(Constants.OBJ_BLOB, base);
 			ObjectId idB = fmt.idFor(Constants.OBJ_BLOB, new byte[] { 'b' });
@@ -274,7 +275,8 @@ public class PackFileTest extends LocalDiskRepositoryTestCase {
 			deflate(pack, delta);
 			byte[] footer = digest(pack);
 
-		File dir = new File(repo.getObjectDatabase().getDirectory(), "pack");
+			File dir = new File(repo.getObjectDatabase().getDirectory(),
+					"pack");
 			File packName = new File(dir, idA.name() + ".pack");
 			File idxName = new File(dir, idA.name() + ".idx");
 
@@ -306,6 +308,7 @@ public class PackFileTest extends LocalDiskRepositoryTestCase {
 				packFile.close();
 			}
 		}
+	}
 
 	private static byte[] clone(int first, byte[] base) {
 		byte[] r = new byte[base.length];