package ...

import ...

public class ExtendedEditPartProvider extends TestProjectEditPartProvider
{
  @Override
  public synchronized IGraphicalEditPart createGraphicEditPart(View view)
  {
    IGraphicalEditPart iEditPart = super.createGraphicEditPart(view);

    if (view instanceof NodeImpl)
    {
        // #1 at startup see if connections exist and then paint the background
    }

    if (view instanceof EdgeImpl)
    {
        // #2 if connection is created, paint target and source background
        // and rename the target's label according to which anchor has been
        // used for the connection
    }

    return iEditPart;
  }
}