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+package Memento;%0A%0Aimport BuilderPattern.Reservation;%0Aimport FactoryMethod.Customer;%0Aimport java.io.Serializable;%0A%0Apublic class Memento implements Serializable%7B%0A%0AReservation reservation;%0ACustomer customer;%0A         %0Apublic Memento(Customer customer, Reservation reservation)%0A   %7B%0A    this.customer = customer;%0A    this.reservation = reservation;           %0A   %7D%0A%0A%7D%0A    %0A%0A

Create Memento.java