code: public Article addMediaContent(MediaContent mediaContent) {
  		if(mediaContent == null)
  			return this;
  
  		if(this.mediaContentVec == null)
  			this.mediaContentVec = new Vector<>();
  
  		this.mediaContentVec.add(mediaContent);
  
  		return this;
  	}
docs: Adds a single media content item to the list
  @param mediaContent The media content object to add