An Android Studio (and IDEA) file template that generates a Fragment with all the boilerplate: TAG (with a String literal), newInstance() factory method with arguments Bundle, check for bundle in onCreate, check and attach the Callback in onAttach, attach STUB callback in onDetach and the implementation of a STUB.

FragmentFileTemplate.java

#if (${PACKAGE_NAME} && ${PACKAGE_NAME} != "")package ${PACKAGE_NAME};#end

import android.content.Context;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;

#parse("File Header.java")
public class ${NAME} extends Fragment {

    public static final String TAG = "${NAME}";

    public static ${NAME} newInstance() {
        ${NAME} fragment = new ${NAME}();
        Bundle bundle = new Bundle();

        // add arguments to bundle

        fragment.setArguments(bundle);
        return fragment;
    }

    interface Callbacks {
        Callbacks STUB = new Callbacks() { };
    }

    private Callbacks callbacks = Callbacks.STUB;

        @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        if (getArguments() == null) {
            throw new UnsupportedOperationException("Fragment must be instantiated using newInstance() method.");
        }
    }

        @Override
    public void onAttach(Context context) {
        if (context instanceof Callbacks) {
            super.onAttach(context);
            this.callbacks = (Callbacks) context;
        } else {
            throw new IllegalArgumentException(String.format(
                    "%s must implement %s", context.getClass().getSimpleName(), Callbacks.class.getSimpleName()
            ));
        }
    }

    @Override
    public void onDetach() {
        super.onDetach();
        this.callbacks = Callbacks.STUB;
    }
}