Formatted all files to the same standard

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

@@ -3,13 +3,14 @@ package com.iluwatar;
 /**
  * 
  * Singleton class.
- *
+ * 
  */
 public class IvoryTower {
 
 	private static IvoryTower instance = new IvoryTower();
-	
-	private IvoryTower() {}
+
+	private IvoryTower() {
+	}
 
 	public static IvoryTower getInstance() {
 		return instance;