title: Adding user input text to .txt file
body: <p>I'm trying to update a .txt file containing a list of movies and some information by asking the user said information.
  The file is organized like this:</p>
  
  <pre><code>0000-Movie Title Goes Here-9.99-ClientID
  0001-Same thing here-9.99-CLIENTID2  
  </code></pre>
  
  <p>And so on.</p>
  
  <p>Here's the code I'm using: </p>
  
  <pre><code>    BufferedWriter output = new BufferedWriter(new FileWriter("movies.txt", true));
      System.out.println("Inserte numero de la pelicula:\n");
      String pelNum = CTeclado.ReadString();
      System.out.println("Inserte el titulo de la pelicula:\n");
      String pelName = CTeclado.ReadString();
      System.out.println("Inserte el precio de la pelicula:\n");
      String pelPrice = CTeclado.ReadString();
      output.append(pelNum + "-" + pelName + "-" + pelPrice + "-null");
      output.close();
      ReadM();
      System.out.println("Pelicula agregada!\n");
      MainMenu();
  </code></pre>
  
  <p>(The CTeclado thing is used for reading input)<br>
  This compiles without error, however, there's no change in the actual file....
  What's wrong with my code?</p>