//create workers
Worker worker1 = new Worker("Caroline Bret", 33, "Tetra Pack", true);
Worker worker2 = new Worker("Evelyne Jain", 54, "Tetra Pack", false);
Worker worker3 = new Worker("Tim Jorge", 28, "Tetra Pack", false);
//create managers
Manager manager1 = new Manager("Jean Duverge", 52, "Tetra Pack", "Sales");
Manager manager2 = new Manager("Eric Mento", 49, "Tetra Pack", "Marketing");
worker1.addManager(manager1);
worker2.addManager(manager1);
worker2.addManager(manager2);
worker3.addManager(manager2);