Program won't provide an output

public class ForumPost {
  private User mAuthor;
  private String mTitle;
  private String mDescription;

  public ForumPost(User author, String title, String description) {
    mAuthor = author;
    mTitle = title;
    mDescription = description;
  }

  public User getAuthor() {
    return mAuthor;
  }

  public String getTitle() {
    return mTitle;
  }

  public String getDescription() {
    return  mDescription;
  }

  // TODO: We need to expose the description
}

public class User {
  private String mFirstName;
  private String mLastName;

  public User(String firstName, String lastName) {
    // TODO:  Set the private fields here
    mFirstName = firstName;
    mLastName = lastName;    
  }

  public String getFirstName() {
    return mFirstName;
  }

   public String getLastName() {
    return mLastName;
  }

}

public class Forum {
  private String mTopic;

  public Forum(String topic) {
   mTopic = topic;
  }

  public String getTopic() {
      return mTopic;
  }

  public void addPost(ForumPost post) {

      // When all is ready uncomment this...
      System.out.printf("New post from %s %s about %s.\n",
                         post.getAuthor().getFirstName(),
                         post.getAuthor().getLastName(),
                         post.getTitle());

  }
}

public class Example {
    public static void main(String[] args) {

      int one;

      one = 1 / 0;

      System.out.println("testMain");

      /*
      System.out.println("Starting forum example...");
      //if (1 == 1) {
      if (args.length < 2) {
        System.out.println("first and last name are required. eg:  java Example Craig Dennis");
      }
      Forum forum = new Forum("Java");
      //Take the first two elements passed args
      User author = new User("Corbin", "Gjerstad");
      //Add the author, title and description
      ForumPost post = new ForumPost(author, "Java Almost!", "Starting to get java! I may be a programmer yet!");
      //System.out.printf("test1");
      forum.addPost(post);

      */
  }
}