LockFileTest: Open Git instance in try-with-resource

Change-Id: Ie2b0e55e606f50c46e21227f23de74dbea8388e5
Signed-off-by: David Pursehouse <david.pursehouse@sonymobile.com>

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(), 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();
+			}
 		}
 	}
 }