Formatted all files to the same standard

visitor/src/main/java/com/iluwatar/UnitVisitor.java

@@ -3,12 +3,14 @@ package com.iluwatar;
 /**
  * 
  * Visitor interface.
- *
+ * 
  */
 public interface UnitVisitor {
 
 	void visitSoldier(Soldier soldier);
+
 	void visitSergeant(Sergeant sergeant);
+
 	void visitCommander(Commander commander);
-	
+
 }