code: public static DataSource createDataSource(String driverClassName, String url, String userName, String password) throws SQLException {
          return createDataSource(driverClassName, url, userName, password, 10, 100);
      }
docs: Returns new Pooled {@link DataSource} implementation
  <p/>
  In case this function won't work - use {@link #createDataSource(java.util.Properties)}
  
  @param driverClassName Driver Class name
  @param url             Database connection url
  @param userName        Database user name
  @param password        Database user password
  @return new Pooled {@link DataSource} implementation
  @throws SQLException