Modify engine type and add interface Option

garage/src/Engine/DieselEngine.java

 package Engine;
 
-public class DieselEngine {
+public class DieselEngine extends Engine {
+
+    public DieselEngine(String _cylindre, Double _price) {
+
+        super(_cylindre, _price);
+        this.type = EngineType.DIESEL;
+    }
+
+    public String toString() {
+        return "Diesel Engine";
+    }
 }

garage/src/Engine/Engine.java

@@ -2,18 +2,23 @@ package Engine;
 
 public class Engine {
 
-    private EngineType type;
+    protected EngineType type;
     private String cylindre;
     private Double price;
 
-    public Engine (EngineType _type, String _cylindyre, Double price) {
-
+    public Engine (String _cylindre, Double _price) {
 
+        this.cylindre = _cylindre;
+        this.price = _price;
 
     }
 
     public String toString() {
+        return "This vehicle has a " + cylindre + "engine, it's a " + type + " engine and it costs " + price + " €.";
+    }
 
+    public String getCylindre() {
+        return this.cylindre;
     }
 
     public Double getPrice() {

garage/src/Option/Option.java

+package Option;
+
+public class Option {
+
+
+}