Design pattern for default implementation with empty methods

Question

Is there a specific design pattern that describes the scenario where a non-abstract default implementation is provided that implements all or some of the method

Answer 1

To me this seems closest to the Special Case or Null Object pattern.

Your updates suggest something similar to Template Method expect that you don't have a single method that calls each template method e.g.

public void doEverything()
{
  doThis();
  doThat();
  done();
}