title: Need to create a new RunTimeException for EmptyStacks
body: <p>So my task may sound simple, but it has me boggled.
  I have looked through code on the internet, but I cannot get to grips with. Neither can I
  get to grips with the slides my teacher posted. This is what is required from me.</p>
  
  <p>Create a new runtime exception type called EmptyStackException.</p>
  
  <p>However I have no clue how to make the method, class, variable or whatever needs to be made in order to fulfill the requirement.
  I have a few classes that are implementations of a DynamicArrayStack and a LinkedStack. An interface for Stack.</p>
  
  <p>Any pointers would be mightily helpful.</p>
  
  <p>Thanks</p>
  
  <p>Mjall2</p>