HADOOP-13411. Checkstyle suppression by annotation or comment. Contributed by John Zhuge.

hadoop-build-tools/src/main/resources/checkstyle/checkstyle.xml

@@ -49,6 +49,10 @@
 
 <module name="Checker">
 
+    <module name="SuppressWarningsFilter"/>
+    <module name="SuppressionCommentFilter"/>
+    <module name="SuppressWithNearbyCommentFilter"/>
+
     <!-- Checks that a package.html file exists for each package.     -->
     <!-- See http://checkstyle.sf.net/config_javadoc.html#PackageHtml -->
     <module name="JavadocPackage"/>
@@ -67,6 +71,10 @@
 
     <module name="TreeWalker">
 
+        <module name="SuppressWarningsHolder"/>
+        <module name="FileContentsHolder"/>
+
+
         <!-- Checks for Javadoc comments.                     -->
         <!-- See http://checkstyle.sf.net/config_javadoc.html -->
         <module name="JavadocType">
@@ -180,7 +188,7 @@
         <module name="Indentation">
             <property name="basicOffset" value="2" />
             <property name="caseIndent" value="0" />
-        </module> 
+        </module>
         <!--<module name="TodoComment"/>-->
         <module name="UpperEll"/>