From 33c009a45d95c9b582db25acd205d087e01e2085 Mon Sep 17 00:00:00 2001
From: Kihwal Lee <kihwal@apache.org>
Date: Thu, 10 Jan 2019 13:21:37 -0600
Subject: [PATCH] HADOOP-15909. KeyProvider class should implement Closeable.
 Contributed by Kuhu Shukla.

---
 .../main/java/org/apache/hadoop/crypto/key/KeyProvider.java    | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/crypto/key/KeyProvider.java b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/crypto/key/KeyProvider.java
index 2380f7a2c25..a8c283ab649 100644
--- a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/crypto/key/KeyProvider.java
+++ b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/crypto/key/KeyProvider.java
@@ -20,6 +20,7 @@ package org.apache.hadoop.crypto.key;
 
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
+import java.io.Closeable;
 import java.io.IOException;
 import java.io.InputStreamReader;
 import java.io.OutputStreamWriter;
@@ -54,7 +55,7 @@ import static org.apache.hadoop.fs.CommonConfigurationKeysPublic.HADOOP_SECURITY
  */
 @InterfaceAudience.Public
 @InterfaceStability.Unstable
-public abstract class KeyProvider {
+public abstract class KeyProvider implements Closeable {
   public static final String DEFAULT_CIPHER_NAME =
       CommonConfigurationKeysPublic.HADOOP_SECURITY_KEY_DEFAULT_CIPHER_KEY;
   public static final String DEFAULT_CIPHER =