public void raiseSalary(int employeeType) throws Exception
	{
		switch (employeeType) {
		case JUNIOR:
			this.salary = (salary * 105 + 10000) / 100;
			break;
		case MEDIOR:
			this.salary = (salary * 106 + 20000) / 100;
			break;
		case SENIOR:
			this.salary = (salary * 107) / 100;
			break;
		default:
			throw new Exception("Invalid employeetype");
		}
	}