code: public DocxStamperConfiguration addCommentProcessor(Class<?> interfaceClass,
                                                        ICommentProcessor commentProcessor) {
      this.commentProcessors.put(interfaceClass, commentProcessor);
      return this;
    }
docs: Registers the specified ICommentProcessor as an implementation of the
  specified interface.
  
  @param interfaceClass   the Interface which is implemented by the commentProcessor.
  @param commentProcessor the commentProcessor implementing the specified interface.