wro4j-core/src/main/java/ro/isdc/wro/manager/factory/ConfigurableWroManagerFactory.java
protected Properties newConfigProperties() {
    // default location is /WEB-INF/wro.properties
    final Properties props = new Properties();
    try {
      return new ServletContextPropertyWroConfigurationFactory(Context.get().getServletContext()).createProperties();
    } catch (final Exception e) {
      LOG.warn("No configuration property file found. Using default values.", e);
    }
    return props;
  }
protected Properties newConfigProperties() {
    // default location is /WEB-INF/wro.properties
    final Properties props = new Properties();
    try {
      return new ServletContextPropertyWroConfigurationFactory(Context.get().getServletContext()).createProperties();
    } catch (final Exception e) {
      LOG.warn("No configuration property file found. Using default values.", e);
    }
    return props;
  }
Override this method to provide a different config properties file location. It is very likely that you would like
it to be the same as the one used by the {@link FilterConfigWroConfigurationFactory}. The default properties file
location is /WEB-INF/wro.properties.

@return a not null properties object used as a secondary configuration option for processors if these are not
configured in init-param.