Абстрактный классы

public abstract class Man {
    private String surname;
    private String firstName;
    private String patronymic;
    private String dateOfBirthday;
    private String sex;
 
    public Man(){
 
    }
    public Man(String surname, String firstName, String patronymic, String dateOfBirthday, String sex) {
        this.surname = surname;
        this.firstName = firstName;
        this.patronymic = patronymic;
        this.dateOfBirthday = dateOfBirthday;
        this.sex = sex;
    }
 
    public String getSurname() {
        return surname;
    }
 
    public String getFirstName() {
        return firstName;
    }
 
    public String getPatronymic() {
        return patronymic;
    }
 
    public String getDateOfBirthday() {
        return dateOfBirthday;
    }
 
    public String getSex() {
        return sex;
    }
}

public class Worker extends Man {
    private String subdivision;
    private String position;
    private double salary;
 
    public Worker(){
 
    }
 
    public Worker(String surname, String firstName, String patronymic, String dateOfBirthday, String sex, String subdivision,
                  String position, double salary){
        super(surname, firstName, patronymic, dateOfBirthday, sex);
        this.subdivision = subdivision;
        this.position = position;
        this.salary = salary;
    }
 
    public String toString(){
        return "Фамилия: " + getSurname() + " Имя: " + getFirstName() + " Отчество: " + getPatronymic() + "\nДата рождения: "
                + getDateOfBirthday() + "\nПол: " + getSex() + "\nПодразделение: " + this.subdivision + " должность: "
                + this.position + " заработная плата: " + this.salary;
    }
}

public class Main {
    public static void main(String[] args) {
        Worker[] worker = new Worker[3];
        worker[0] = new Worker("Ivanov", "Ivan", "Ivanovich", "01.01.1990",
                "men", "IT", "director", 1500);
 
        System.out.println(worker[0].toString());
    }
}

public interface Constatable{
...

abstract class Quest{
...