#354 Clean up

feature-toggle/src/main/java/com/iluwatar/featuretoggle/App.java

@@ -31,26 +31,57 @@
 import java.util.Properties;
 
 /**
+ * The Feature Toggle pattern allows for complete code executions to be turned on or off with ease. This allows features
+ * to be controlled by either dynamic methods just as {@link User} information or by {@link Properties}. In the App
+ * below there are two examples. Firstly the {@link Properties} version of the feature toggle, where the enhanced
+ * version of the welcome message which is personalised is turned either on or off at instance creation. This method
+ * is not as dynamic as the {@link User} driven version where the feature of the personalised welcome message is
+ * dependant on the {@link UserGroup} the {@link User} is in. So if the user is a memeber of the
+ * {@link UserGroup#isPaid(User)} then they get an ehanced version of the welcome message.
+ *
+ * Note that this pattern can easily introduce code complexity, and if not kept in check can result in redundant
+ * unmaintained code within the codebase.
  *
  */
 public class App {
 
   /**
+   *  Block 1 shows the {@link PropertiesFeatureToggleVersion} being run with {@link Properties} setting the feature
+   *  toggle to enabled.
+   *
+   *  Block 2 shows the {@link PropertiesFeatureToggleVersion} being run with {@link Properties} setting the feature
+   *  toggle to disabled. Notice the difference with the printed welcome message the username is not included.
+   *
+   *  Block 3 shows the {@link com.iluwatar.featuretoggle.pattern.tieredversion.TieredFeatureToggleVersion} being
+   *  set up with two users on who is on the free level, while the other is on the paid level. When the
+   *  {@link Service#getWelcomeMessage(User)} is called with the paid {@link User} note that the welcome message
+   *  contains their username, while the same service call with the free tier user is more generic. No username is
+   *  printed.
    *
+   *  @see User
+   *  @see UserGroup
+   *  @see Service
+   *  @see PropertiesFeatureToggleVersion
+   *  @see com.iluwatar.featuretoggle.pattern.tieredversion.TieredFeatureToggleVersion;
    */
   public static void main(String[] args) {
+
     final Properties properties = new Properties();
     properties.put("enhancedWelcome", true);
     Service service = new PropertiesFeatureToggleVersion(properties);
     final String welcomeMessage = service.getWelcomeMessage(new User("Jamie No Code"));
     System.out.println(welcomeMessage);
 
+    // ---------------------------------------------
+
     final Properties turnedOff = new Properties();
     turnedOff.put("enhancedWelcome", false);
     Service turnedOffService = new PropertiesFeatureToggleVersion(turnedOff);
     final String welcomeMessageturnedOff = turnedOffService.getWelcomeMessage(new User("Jamie No Code"));
     System.out.println(welcomeMessageturnedOff);
 
+    // --------------------------------------------
+
     final User paidUser = new User("Jamie Coder");
     final User freeUser = new User("Alan Defect");