added factory method sample

factory-method/src/main/java/com/iluwatar/App.java

@@ -0,0 +1,22 @@
+package com.iluwatar;
+
+public class App 
+{
+    public static void main( String[] args )
+    {
+    	Blacksmith blacksmith;
+    	Weapon weapon;
+    	
+    	blacksmith = new OrcBlacksmith();
+    	weapon = blacksmith.manufactureWeapon(WeaponType.SPEAR);
+    	System.out.println(weapon);
+    	weapon = blacksmith.manufactureWeapon(WeaponType.AXE);
+    	System.out.println(weapon);
+    	
+    	blacksmith = new ElfBlacksmith();
+    	weapon = blacksmith.manufactureWeapon(WeaponType.SHORT_SWORD);
+    	System.out.println(weapon);
+    	weapon = blacksmith.manufactureWeapon(WeaponType.SPEAR);
+    	System.out.println(weapon);
+    }
+}