title: UML Diagram with interface
body: <p>I need to create UML diagram for my program, car park, I'am not sure what to do after I have designed those classes. The program is constructed out of  7 classes.</p>
  
  <pre><code>Vehicle implements Comparable&lt;Vehicle&gt;
  Car extends Vehicle
  Van extends Vehicle
  Motorbike extends Vehicle
  interface CarPark
  CarParkManager implements CarPark
  DateTime
  </code></pre>
  
  <p>Right now im not sure how and where to add those remaining classes or if they should be connected to the vehicle ? Any tips on that ?</p>