Improved comments for state pattern.

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

@@ -1,5 +1,10 @@
 package com.iluwatar;
 
+/**
+ * 
+ * Angry state.
+ *
+ */
 public class AngryState implements State {
 
 	private Mammoth mammoth;

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

@@ -2,10 +2,12 @@ package com.iluwatar;
 
 /**
  * 
- * In State pattern the object (Mammoth) has internal state object (State) that
+ * In State pattern the container object (Mammoth) has an internal state object (State) that
  * defines the current behavior. The state object can be changed to alter the
  * behavior.
  * 
+ * In this example the mammoth changes its behavior as time passes by.
+ * 
  */
 public class App {
 

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

@@ -1,5 +1,10 @@
 package com.iluwatar;
 
+/**
+ * 
+ * Peaceful state.
+ *
+ */
 public class PeacefulState implements State {
 
 	private Mammoth mammoth;