OOP-master-challenge

/**
 * The purpose of the application is to help a fictitious company called Bills Burgers to manage 
 * their process of selling hamburgers.
 * Our application will help Bill to select types of burgers, some of the additional items (additions) to
 * be added to the burgers and pricing.
 * We want to create a base hamburger, but also two other types of hamburgers that are popular ones in Bills store.
 * The basic hamburger should have the following items.
 * Bread roll type, meat and up to 4 additional additions (things like lettuce, tomato, carrot, etc) that
 * the customer can select to be added to the burger.
 * Each one of these items gets charged an additional price so you need some way to track how many items got added
 * and to calculate the final price (base burger with all the additions).
 * This burger has a base price and the additions are all separately priced (up to 4 additions, see above).
 * Create a Hamburger class to deal with all the above.
 * The constructor should only include the roll type, meat and price, can also include name of burger or you 
 * can use a setter.
 * 
 * Also create two extra varieties of Hamburgers (subclasses) to cater for
 * a) Healthy burger (on a brown rye bread roll), plus two addition items that can be added.
 * The healthy burger can have 6 items (Additions) in total.
 * hint:  you probably want to process the two additional items in this new class (subclass of Hamburger),
 * not the base class (Hamburger), since the two additions are only appropriate for this new class
 * (in other words new burger type).
  * hint:  You have to find a way to automatically add these new additions at the time the deluxe burger
 * object is created, and then prevent other additions being made.
 * All 3 classes should have a method that can be called anytime to show the base price of the hamburger
 * plus all additionals, each showing the addition name, and addition price, and a grand/final total for the
 * burger (base price + all additions)
 * For the two additional classes this may require you to be looking at the base class for pricing and then
 * adding totals to final price.
 */