MySQL JDBC connection

try
{
  Class.forName("com.mysql.jdbc.Driver").newInstance();
  String url = "jdbc:mysql://HOST/DATABASE";
  conn = DriverManager.getConnection(url, "username", "password");
  doTests();
  conn.close();
}
catch (ClassNotFoundException ex) {System.err.println(ex.getMessage());}
catch (IllegalAccessException ex) {System.err.println(ex.getMessage());}
catch (InstantiationException ex) {System.err.println(ex.getMessage());}
catch (SQLException ex)           {System.err.println(ex.getMessage());}