HADOOP-13118. Fix IOUtils#cleanup and IOUtils#closeStream javadoc. Contributed by Wei-Chiu Chuang.

(cherry picked from commit 0f0c6415af409d213e7a132390a850c1251b92ef)

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/IOUtils.java

@@ -234,7 +234,7 @@ public class IOUtils {
   }
   
   /**
-   * Close the Closeable objects and <b>ignore</b> any {@link IOException} or 
+   * Close the Closeable objects and <b>ignore</b> any {@link Throwable} or
    * null pointers. Must only be used for cleanup in exception handlers.
    *
    * @param log the log to record problems to at debug level. Can be null.
@@ -255,7 +255,7 @@ public class IOUtils {
   }
 
   /**
-   * Closes the stream ignoring {@link IOException}.
+   * Closes the stream ignoring {@link Throwable}.
    * Must only be called in cleaning up from exception handlers.
    *
    * @param stream the Stream to close