CommitCommand: Open InputStream in try-with-resource

Change-Id: I800a2afae17f84636cae593be7f07628fb8476c1
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>

org.eclipse.jgit/src/org/eclipse/jgit/api/CommitCommand.java

@@ -409,14 +409,11 @@ public class CommitCommand extends GitCommand<RevCommit> {
 									inserter = repo.newObjectInserter();
 								long contentLength = fTree
 										.getEntryContentLength();
-								InputStream inputStream = fTree
-										.openEntryStream();
-								try {
+								try (InputStream inputStream = fTree
+										.openEntryStream()) {
 									dcEntry.setObjectId(inserter.insert(
 											Constants.OBJ_BLOB, contentLength,
 											inputStream));
-								} finally {
-									inputStream.close();
 								}
 							}
 						}