public class DBHelperMysql {
    private final String dbHost;
    private final String dbUser;
    private final String dbPassword;
    private org.slf4j.Logger logger;
    public final String JDBC_DRIVER = "com.mysql.jdbc.Driver";

    public DBHelperMysql(String dbHost, String dbUser, String dbPassword, Logger logger) {
        //STEP 2: Register JDBC driver
        this.logger = logger;
        this.dbHost = dbHost;
        this.dbUser = dbUser;
        this.dbPassword = dbPassword;
    }

    public void init() throws ClassNotFoundException {
        Class.forName(JDBC_DRIVER);
    }

    synchronized public Statement open() throws ClassNotFoundException, SQLException {
        Connection conn = DriverManager.getConnection(String.format("jdbc:mysql://%s?useUnicode=true&characterEncoding=UTF-8", dbHost), dbUser, dbPassword);
        Statement stmt = conn.createStatement();
        return stmt;
    }