Hi Djerk ,
When you open any view in a component , on right side of it you can see the view structure.
Under this view structure you can see class on top mentioned as Implementation class cl_xxxx_impl.
So you dont need to create any implementation class.
In View structure there is one node with name Request Processing .
Expand this node , you'll see DO_CONFIG_DETERMINATION .
If there is one icon in Yellow , it means this methos is not redefined .
To redefine this - Just right click on this and select redefine.
This method is useful if we have more than one configuration for the same view.
Thanks.