Comments for state example.

state/src/main/java/com/iluwatar/App.java

 package com.iluwatar;
 
+/**
+ * 
+ * In State pattern the object (Mammoth) has internal
+ * state object (State) that defines the current
+ * behavior. The state object can be changed
+ * to alter the behavior.
+ *
+ */
 public class App 
 {
     public static void main( String[] args )

state/src/main/java/com/iluwatar/Mammoth.java

 package com.iluwatar;
 
+/**
+ * 
+ * Mammoth has internal state that defines its behavior.
+ *
+ */
 public class Mammoth {
 	
 	private State state;

state/src/main/java/com/iluwatar/State.java

 package com.iluwatar;
 
+/**
+ * 
+ * State interface.
+ *
+ */
 public interface State {
 
 	void onEnterState();