"Method 'setUp' is not designed for extension" in an abstract class

[mdumrauf]

Given this example:

public abstract class A {

  public void Foo() {
        // Does something interesting.
  }

}

public class B extends A {

  @Override
  public void Foo() {
        // Does something more interesting.
  }

}

The warning "Method 'setUp' is not designed for extension" is shown. But if Foo() method in A is declared as final, then B could not override it.