private void initDatabase() {
   mDatabaseHelper = new DatabaseHelper(this);
   try {
     mDatabaseHelper.openDatabase();
   } catch (Exception e) {
     e.printStackTrace();
     DialogAlertFragment dialogError =
         DialogAlertFragment.newInstance("Error al acceder a la Base de datos");
     dialogError.setOnClickListener(this);
     dialogError.show(getSupportFragmentManager(), "dialogError");
   }
 }
 @Override
 public void onClick(View v) {
   Log.i(TAG, "onClick");
   if (v.getId() == mTextViewSalir.getId()) {
     finish();
   } else {
     if (mOfficeSelected > 0) {
       Intent intent = new Intent(this, QuestionsActivity.class);
       intent.putExtra("officeSelected", mOfficeSelected);
       startActivity(intent);
     } else {
       DialogAlertFragment dialogError =
           DialogAlertFragment.newInstance("Debe Seleccionar una oficina del mapa");
       dialogError.show(getSupportFragmentManager(), "dialogErrorMap");
     }
   }
 }