RecyclerView implementation with different holders and different files

RecyclerView, RecyclerViewAdapter y RecyclerViewHolder

/**
 * Created by Dinorah Tovar on 12/20/17.
 * RecyclerView Implementation inside Activity/Fragment
 */

//...
RecyclerViewAdapter adapter = new RecyclerViewAdapter();
final LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity());
layoutManager.setOrientation(LinearLayoutManager.VERTICAL);
recyclerView.setLayoutManager(layoutManager);
recyclerView.setAdapter(adapter);
//...

RecyclerViewAdapter

/**
 * Created by Dinorah Tovar on 12/20/17.
 * RecyclerViewAdapter, for this example, the RecyclerViewAdapter need to fill two diferents Holders, thats the reason
 * that getItemCount returns 2
 */

public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {

    public RecyclerViewAdapter () {
        
    }

    @Override
    public int getItemViewType(int position) {
        return position;
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        if (viewType == 0)
            return new FirstHolder(LayoutInflater.from(parent.getContext()).inflate(R.layout.holder, parent, false));
        else
            return new FirstHoler(LayoutInflater.from(parent.getContext()).inflate(R.layout.holder, parent, false));
    }

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
        if (position == 0) {
            FirstHolder holderHeader = (FirstHolder) holder;
            holderHeader.setValues();
        } else {
            FirstHolder holderBody = (FirstHolder) holder;
            holderBody.setValues();
        }
    }

    @Override
    public int getItemCount() {
        return 2;
    }

RecyclerViewHolder

/**
 * Created by Dinorah Tovar on 12/20/17.
 * RecyclerViewHolder in separated files
 * Butterknife options for inflate holder is avaliable with comments
 */
 
public class FirstHolder extends RecyclerView.ViewHolder {

    private TextView textView;
    //        @BindView(R.id.textView2) TextView ButterknifeTextView;

    public FirstHolder(View itemView) {
        super(itemView);
        //      ButterKnife.bind(this, itemView);
        textView = (TextView) view.findViewById(R.id.textView1);
    }

    public void setValues () {
        textView.setText ("Hello this is a RecyclerViewHolder")
        //        textView.setText ("Hello this is a RecyclerViewHolder inflated with Butteknife")

    }

}