Use try-with-resources in SubmoduleWalk

Convert try finally block to try-with-resources
Change-Id: Ifd676a2aba3e926bd2f3b6b8fefd5f63564899ed
Signed-off-by: Carsten Hammer <carsten.hammer@t-online.de>
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

org.eclipse.jgit/src/org/eclipse/jgit/submodule/SubmoduleWalk.java

@@ -149,21 +149,20 @@ public class SubmoduleWalk implements AutoCloseable {
 	 */
 	public static SubmoduleWalk forPath(Repository repository,
 			AnyObjectId treeId, String path) throws IOException {
-		SubmoduleWalk generator = new SubmoduleWalk(repository);
-		try {
+		try (SubmoduleWalk generator = new SubmoduleWalk(repository)) {
 			generator.setTree(treeId);
 			PathFilter filter = PathFilter.create(path);
 			generator.setFilter(filter);
 			generator.setRootTree(treeId);
-			while (generator.next())
-				if (filter.isDone(generator.walk))
+			while (generator.next()) {
+				if (filter.isDone(generator.walk)) {
 					return generator;
+				}
+			}
+			return null;
 		} catch (IOException e) {
-			generator.close();
 			throw e;
 		}
-		generator.close();
-		return null;
 	}
 
 	/**
@@ -182,21 +181,20 @@ public class SubmoduleWalk implements AutoCloseable {
 	 */
 	public static SubmoduleWalk forPath(Repository repository,
 			AbstractTreeIterator iterator, String path) throws IOException {
-		SubmoduleWalk generator = new SubmoduleWalk(repository);
-		try {
+		try (SubmoduleWalk generator = new SubmoduleWalk(repository)) {
 			generator.setTree(iterator);
 			PathFilter filter = PathFilter.create(path);
 			generator.setFilter(filter);
 			generator.setRootTree(iterator);
-			while (generator.next())
-				if (filter.isDone(generator.walk))
+			while (generator.next()) {
+				if (filter.isDone(generator.walk)) {
 					return generator;
+				}
+			}
+			return null;
 		} catch (IOException e) {
-			generator.close();
 			throw e;
 		}
-		generator.close();
-		return null;
 	}
 
 	/**