RecursiveMergerTest: Open FileOutputStream in try-with-resource

Change-Id: I158333d6393fb807bc21fba23fec7ad474384471
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>

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

@@ -817,40 +817,35 @@ public class RecursiveMergerTest extends RepositoryTestCase {
 
 	void modifyWorktree(WorktreeState worktreeState, String path, String other)
 			throws Exception {
-		FileOutputStream fos = null;
-		ObjectId bloblId;
-
-		try {
-			switch (worktreeState) {
-			case Missing:
-				new File(db.getWorkTree(), path).delete();
-				break;
-			case DifferentFromHeadAndOther:
-				write(new File(db.getWorkTree(), path),
-						Integer.toString(counter++));
-				break;
-			case SameAsHead:
-				bloblId = contentId(Constants.HEAD, path);
-				fos = new FileOutputStream(new File(db.getWorkTree(), path));
-				db.newObjectReader().open(bloblId).copyTo(fos);
-				break;
-			case SameAsOther:
-				bloblId = contentId(other, path);
-				fos = new FileOutputStream(new File(db.getWorkTree(), path));
-				db.newObjectReader().open(bloblId).copyTo(fos);
-				break;
-			case Bare:
-				if (db.isBare())
-					return;
-				File workTreeFile = db.getWorkTree();
-				db.getConfig().setBoolean("core", null, "bare", true);
-				db.getDirectory().renameTo(new File(workTreeFile, "test.git"));
-				db = new FileRepository(new File(workTreeFile, "test.git"));
-				db_t = new TestRepository<>(db);
+		switch (worktreeState) {
+		case Missing:
+			new File(db.getWorkTree(), path).delete();
+			break;
+		case DifferentFromHeadAndOther:
+			write(new File(db.getWorkTree(), path),
+					Integer.toString(counter++));
+			break;
+		case SameAsHead:
+			try (FileOutputStream fos = new FileOutputStream(
+					new File(db.getWorkTree(), path))) {
+				db.newObjectReader().open(contentId(Constants.HEAD, path))
+						.copyTo(fos);
 			}
-		} finally {
-			if (fos != null)
-				fos.close();
+			break;
+		case SameAsOther:
+			try (FileOutputStream fos = new FileOutputStream(
+					new File(db.getWorkTree(), path))) {
+				db.newObjectReader().open(contentId(other, path)).copyTo(fos);
+			}
+			break;
+		case Bare:
+			if (db.isBare())
+				return;
+			File workTreeFile = db.getWorkTree();
+			db.getConfig().setBoolean("core", null, "bare", true);
+			db.getDirectory().renameTo(new File(workTreeFile, "test.git"));
+			db = new FileRepository(new File(workTreeFile, "test.git"));
+			db_t = new TestRepository<>(db);
 		}
 	}