Improved the adapter pattern example. Updated the class diagram.

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

@@ -3,14 +3,15 @@ package com.iluwatar;
 /**
  * 
  * Adapter (GnomeEngineer) converts the interface of the
- * target class (GoblinGlider) into suitable one.
+ * target class (GoblinGlider) into suitable one expected
+ * by the client (GnomeEngineeringManager).
  *
  */
 public class App 
 {
     public static void main( String[] args )
     {
-    	GnomeEngineer engineer = new GnomeEngineer();
-    	engineer.operateDevice();
+    	GnomeEngineeringManager manager = new GnomeEngineeringManager();
+    	manager.operateDevice();
     }
 }