Add Checstyle UnnecessaryParentheses

src/conf/checkstyle/checkstyle.xml

@@ -80,6 +80,7 @@ limitations under the License.
     <module name="SuperClone" />
     <module name="SuperFinalize" />
     <module name="UnusedImports" />
+    <module name="UnnecessaryParentheses" />
     <module name="UpperEll" />
     <module name="WhitespaceAfter" />
     <module name="WhitespaceAround" />