DefaultNoteMerger: Open UnionInputStream in try-with-resource

Change-Id: I035aa89cdbf235992f41e752f49d735be4e5df0a
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>

org.eclipse.jgit/src/org/eclipse/jgit/notes/DefaultNoteMerger.java

@@ -82,14 +82,11 @@ public class DefaultNoteMerger implements NoteMerger {
 
 		ObjectLoader lo = reader.open(ours.getData());
 		ObjectLoader lt = reader.open(theirs.getData());
-		UnionInputStream union = new UnionInputStream(lo.openStream(),
-				lt.openStream());
-		try {
+		try (UnionInputStream union = new UnionInputStream(lo.openStream(),
+				lt.openStream())) {
 			ObjectId noteData = inserter.insert(Constants.OBJ_BLOB,
 					lo.getSize() + lt.getSize(), union);
 			return new Note(ours, noteData);
-		} finally {
-			union.close();
 		}
 	}
 }