Build a Hotel Reservation and Payment System

Build a Hotel Reservation and Payment System using eclipse. The application to computerize the processes of making hotel reservation, recording of orders and displaying of records. It is solely used by the hotel staff. The application is to be developed as a Console-based application (non-Graphical UI). Data should be stored in flat file format, either in text or binary. No database application (eg MySQL, MS Access, etc) is to be used. Also need to design the UML class diagram and sequence diagram.