public class ConexaoBd {
    public static void main(String[] args) throws SQLException{
        Connection conexao = DriverManager.getConnection("jdbc:mysql://localhost:3306/usuario","root","tonhaoroot");

        conexao.close();
    }
}

public class ConexaoBd {
    public static void main(String[] args) throws SQLException{
        Class.forName("com.mysql.jdbc.Driver"); /* Aqui registra */
        Connection conexao = DriverManager.getConnection("jdbc:mysql://localhost:3306/usuario","root","tonhaoroot");

        conexao.close();
    }
}