Eliminating NULL by using NULL object pattern

interface Parent{
    void process();
}

class Child1 implements Parent{
    void process(){
        //process by method 1
    }
}


class Child2 implements Parent{
    void process(){
        //process by method 2
    }
}

class DummyChild implements Parent{
    void process(){
        //do nothing
    }
}
class D {
    Parent getObj(){
        if(condition1){ 
            return new Child1();
        }
        else if(condition2){    
            return new Child2();
        }
        else
        return new DummyChild();
    }
    public static void main(String[] args){
        Parent obj = getObj();
        obj.process();
    }
}

In the above code, I have created a DummyChild class so that whenever getObj() is invoked for fetching the correct class object, instead of returning NULL I return the dummyClass object(singleton). This eliminates the NULL check in my code thereby removing the branching because of this condition.

Is this a correct place of using the NULL object pattern or should I use the NULL approach?