Описание схожих классов Java

Нужно описать 2 класса, подскажите правильно ли я это сделал? Если нет подскажите как сделать правильно. Заранее спасибо.

public interface Transport { public void go(); }
public class Car implements Transport{
  private String color;
  private Double price;
  private int age;
  private int speed;
  public String getColor() {
    return color;
  }
  public void setColor(String color) {
    this.color = color;
  }
  public Double getPrice() {
    return price;
  }
  public void setPrice(Double price) {
    this.price = price;
  }
  public int getAge() {
    return age;
  }
  public void setAge(int age) {
    this.age = age;
  }
  public Car(String color, Double price, int age, int speed) {
    this.color = color;
    this.price = price;
    this.age = age;
    this.speed = speed;
  }
  public void go() {
    System.out.println("Понеслась!");
  }
  public int getSpeed() {
    return speed;
  }
}
public class Motorcycle implements Transport {
  private String color;
  private Double price;
  private int age;
  private int speed;
  public String getColor() {
    return color;
  }
  public void setColor(String color) {
    this.color = color;
  }
  public Double getPrice() {
    return price;
  }
  public void setPrice(Double price) {
    this.price = price;
  }
  public int getAge() {
    return age;
  }
  public void setAge(int age) {
    this.age = age;
  }

  public void setSpeed(int speed) {
    this.speed = speed;
  }
  public Motorcycle(String color, Double price, int age, int speed) {
    this.color = color;
    this.price = price;
    this.age = age;
    this.speed = speed;
  }

  public void go() {
    System.out.println("Поехали!");
  }
  public int getSpeed() {
    return speed;
  }
}
public class Main {
  public static void main(String[]args) {
    Car volvo = new Car("Red", 520000.00, 7, 90);
    System.out.println(volvo.getSpeed());
    volvo.go();
    Motorcycle scorpio = new Motorcycle("Green", 320000.00, 3, 75);
    System.out.println(scorpio.getSpeed());
    scorpio.go();
  }
}