Java SQL Connection

SQLConnection.java

public class SQLConnection {
    private final Connection connection;

    public SQLConnection(String url, String username, String password) throws SQLException {
        this.connection = DriverManager.getConnection(url, username, password);
    }

    public ResultSet executeQuery(String query) throws SQLException {
        Statement statement = this.connection.createStatement();
        return statement.executeQuery(query);
    }

    public int executeUpdate(String query) throws SQLException {
        Statement statement = this.connection.createStatement();
        return statement.executeUpdate(query);
    }

    public boolean checkConnection() throws SQLException {
        return this.connection != null && !this.connection.isClosed();
    }

    public void close() throws SQLException {
        if (this.connection == null || this.connection.isClosed())
            return;
        this.connection.close();
    }
}