#12 Added private constructor to ThreadSafeLazyLoadedIvoryTower.

singleton/src/main/java/com/iluwatar/ThreadSafeLazyLoadedIvoryTower.java

@@ -9,6 +9,9 @@ public class ThreadSafeLazyLoadedIvoryTower {
 
 	private static ThreadSafeLazyLoadedIvoryTower instance = null;
 	
+	private ThreadSafeLazyLoadedIvoryTower() {
+	}
+
 	public synchronized static ThreadSafeLazyLoadedIvoryTower getInstance() {
 		/*
 		 * The instance gets created only when it is called for first time.