Added comments for bridge example.

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

 package com.iluwatar;
 
+/**
+ * 
+ * In Bridge pattern both abstraction (MagicWeapon) 
+ * and implementation (MagicWeaponImp) have their 
+ * own class hierarchies. The interface of the
+ * implementations can be changed without affecting
+ * the clients.
+ *
+ */
 public class App 
 {
     public static void main( String[] args )

bridge/src/main/java/com/iluwatar/MagicWeapon.java

 package com.iluwatar;
 
+/**
+ * 
+ * Abstraction interface.
+ *
+ */
 public abstract class MagicWeapon {
 
 	protected MagicWeaponImp imp;

bridge/src/main/java/com/iluwatar/MagicWeaponImp.java

 package com.iluwatar;
 
+/**
+ * 
+ * Implementation interface.
+ *
+ */
 public abstract class MagicWeaponImp {
 
 	public abstract void wieldImp();