diff --git a/src/Configuration.java b/src/Configuration.java
index 58d4089..ca5f784 100644
--- a/src/Configuration.java
+++ b/src/Configuration.java
@@ -3,20 +3,31 @@ package src;
 import fr.istic.nplouzeau.cartaylor.api.Category;
 import fr.istic.nplouzeau.cartaylor.api.PartType;
 
-
 import java.util.Set;
 
 public class Configuration implements fr.istic.nplouzeau.cartaylor.api.Configuration {
-    private Set<PartType> partTypes;
+    private Engine e;
+    private Exterior ex;
+    private Interior in;
+    private Transmission tr;
+
+    private CompatibilityManager compatibilityManager;
+    private     
 
     @Override
     public boolean isValid() {
         if ( this.isComplete()){
-            /*TODO*/
-        }else{
+            //TODO
+            return true;
+                
+            }
+        else{
             return false;
         }
+
+        return false;
     }
+    
 
     @Override
     public boolean isComplete() {
diff --git a/src/Engine.java b/src/Engine.java
index da559f7..aaede7a 100644
--- a/src/Engine.java
+++ b/src/Engine.java
@@ -1,4 +1,7 @@
-
+package src;
 public class Engine extends PartType{
+    public Engine (String name){
+        super(name, E)
+    }
 
 }
\ No newline at end of file
diff --git a/src/Exterior.java b/src/Exterior.java
index e69de29..8b709e7 100644
--- a/src/Exterior.java
+++ b/src/Exterior.java
@@ -0,0 +1,5 @@
+package src;
+
+public class Exterior extends PartType{
+    
+}
diff --git a/src/Interior.java b/src/Interior.java
index 5c7f0d2..55a5eae 100644
--- a/src/Interior.java
+++ b/src/Interior.java
@@ -1,3 +1,9 @@
+package src;
 public class Interior extends PartType{
+    public Interior (String name) {
+        this.super(name);
+        this.
+        
+    }
 
 }
\ No newline at end of file
diff --git a/src/Transmission.java b/src/Transmission.java
index e69de29..0a75ee5 100644
--- a/src/Transmission.java
+++ b/src/Transmission.java
@@ -0,0 +1,7 @@
+package src;
+ 
+public class Transmission extends PartType{
+    public Transmission( String nom){
+        super (nom);
+    }
+}
\ No newline at end of file