Simple DAO Pattern using NodeJS.js

index.js

const MySQLDAO = require("./MySQLDAO");

let MySQLDAOInstance = new MySQLDAO();

MySQLDAOInstance.findAll("users");

MySQLDAO.js

//const mysql = require('mysql-library');
const mysql = {
  createConnection: () => {
    return {
      query: (query) => {
        return query;
      }
    }
  }
};

class MySQLDAO {
  constructor(){
    this.connection = this.createConnection();
  }

  createConnection(){
    return mysql.createConnection({
      host: "myhost.com",
      user: "root",
      password: "password"
    });
  }

  findAll(table){
    return this.connection.query("SELECT * FROM " + table);
  }
}

module.exports = MySQLDAO;