wro4j-maven-plugin/src/main/java/ro/isdc/wro/maven/plugin/AbstractWro4jMojo.java
protected WroManagerFactory newWroManagerFactory()
      throws MojoExecutionException {
    WroManagerFactory factory = null;
    if (wroManagerFactory == null) {
      factory = new ConfigurableWroManagerFactory();
    }
    getLog().info("wroManagerFactory class: " + factory.getClass().getName());
    return factory;
  }
protected WroManagerFactory newWroManagerFactory()
      throws MojoExecutionException {
    WroManagerFactory factory = null;
    if (wroManagerFactory == null) {
      factory = new ConfigurableWroManagerFactory();
    }
    getLog().info("wroManagerFactory class: " + factory.getClass().getName());
    return factory;
  }
Allows explicitly to override the default implementation of the factory, assuming {@link #wroManagerFactory}
configuration is not set. When overriding this method, make sure that {@link #onAfterCreate(WroManagerFactory)} is
invoked on newly created factory for proper initialization.