Exempt main method from javadoc requirement

Let's update checkstyle.xml to omit the main method from
the javadoc requirement, as the purpose of the main method
is clear.

Author: Eclipse-Dominator

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. -->