Ignore main method in checkstyle.xml

Main method are not being ignored and are forced to have a javadoc.
This is unnecessary and the purpose of the main method is clear.
Therefore, let's ignore main method from having a javadoc.

config/checkstyle/checkstyle.xml

@@ -424,7 +424,7 @@
     <module name="MissingJavadocMethodCheck">
       <property name="minLineCount" value="1"/>
       <property name="allowMissingPropertyJavadoc" value="true"/>
-      <property name="ignoreMethodNamesRegex" value="(set.*|get.*)"/>
+      <property name="ignoreMethodNamesRegex" value="(set.*|get.*|main)"/>
     </module>
 
     <!-- Checks that every public class, enumeration and interface has a header comment. -->