Work on #385, added documentation and class diagram. Made refactoring changes to pass checkstyle and PMD checks

pom.xml

@@ -123,6 +123,7 @@
 		<module>feature-toggle</module>
 		<module>value-object</module>
 		<module>monad</module>
+		<module>mute-idiom</module>
 	</modules>
 
 	<dependencyManagement>