HBASE-22890 Verify the file integrity in persistent IOEngine

hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/bucket/FileIOEngine.java

@@ -45,7 +45,7 @@
  * IO engine that stores data to a file on the local file system.
  */
 @InterfaceAudience.Private
-public class FileIOEngine implements IOEngine, PersistentIOEngine {
+public class FileIOEngine implements PersistentIOEngine {
   private static final Log LOG = LogFactory.getLog(FileIOEngine.class);
   public static final String FILE_DELIMITER = ",";
   private static final DuFileCommand du = new DuFileCommand(new String[] {"du", ""});

hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/bucket/PersistentIOEngine.java

@@ -1,3 +1,21 @@
+/**
+ * Copyright The Apache Software Foundation
+ *
+ * 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.
+ */
 package org.apache.hadoop.hbase.io.hfile.bucket;
 
 import java.io.IOException;
@@ -10,7 +28,7 @@
  * for {@link BucketCache}
  */
 @InterfaceAudience.Private
-public interface PersistentIOEngine {
+public interface PersistentIOEngine extends IOEngine {
 
   /**
    * Read the persistence checksum from persistence path