Follow checkstyle

tez-common/src/main/java/org/apache/tez/runtime/hook/package-info.java

@@ -0,0 +1,22 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+@Private
+package org.apache.tez.runtime.hook;
+
+import org.apache.hadoop.classification.InterfaceAudience.Private;

tez-dag/src/main/java/org/apache/tez/dag/app/DAGAppMaster.java

@@ -2586,7 +2586,7 @@ private void startDAGExecution(DAG dag, final Map<String, LocalResource> additio
     currentDAG = dag;
     final Configuration conf = dag.getConf();
     final String[] hookClasses = conf.getStrings(TezConfiguration.TEZ_AM_HOOKS, new String[0]);
-    final TezDAGHook[] hooks = new TezDAGHook[hookClasses.length];
+    hooks = new TezDAGHook[hookClasses.length];
     for (int i = 0; i < hooks.length; i++) {
       hooks[i] = ReflectionUtils.createClazzInstance(hookClasses[i]);
       hooks[i].start(dag.getID(), conf);