#107 Improve JavaDoc for Visitor example

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

@@ -5,15 +5,19 @@ package com.iluwatar.visitor;
  * Visitor pattern defines mechanism to apply operations on nodes
  * in hierarchy. New operations can be added without altering the node
  * interface.
- * 
+ * <p>
- * In this example there is a unit hierarchy beginning from Commander.
+ * In this example there is a unit hierarchy beginning from {@link Commander}.
- * This hierarchy is traversed by visitors. SoldierVisitor applies
+ * This hierarchy is traversed by visitors. {@link SoldierVisitor} applies
- * its operation on Soldiers, SergeantVisitor on Sergeants and so
+ * its operation on {@link Soldier}s, {@link SergeantVisitor} on {@link Sergeant}s and so
  * on.
  * 
  */
 public class App {
 
+	/**
+	 * Program entry point
+	 * @param args command line args
+	 */
 	public static void main(String[] args) {
 
 		Commander commander = new Commander(new Sergeant(new Soldier(),

visitor/src/test/java/com/iluwatar/visitor/AppTest.java

@@ -4,6 +4,11 @@ import org.junit.Test;
 
 import com.iluwatar.visitor.App;
 
+/**
+ * 
+ * Application test
+ *
+ */
 public class AppTest {
 
 	@Test