add description in interface

src/fr/api/Configuration.java

@@ -7,12 +7,37 @@ public interface Configuration {
      * @return true if there is no compatibility issue between PartType else false
      */
     boolean isValid();
-
-
+    
+    /*
+     * @return true if the configuration is valid and done
+     */
     boolean isComplete();
+
+    /*
+     * @return the list of the PartType in the configuration
+     */
     Set<PartType> getSelectedParts();
+    
+    /*
+     * Select a PartType to add to the configuration
+     * @param chosenPart : the PartType that we wish to add to the configuration
+     */
     void selectPart(PartType chosenPart);
+
+    /*
+     * @return the PartType that we chose earlier which has Category we choose
+     * @param catgeory : Category that we want to know about the PartType can be null
+     */
     PartType getSelectionForCategory(Category category);
+
+    /*
+     * DeSelect a PartType to delete from the configuration
+     * @param chosenPart : the PartType that we wish to delete from the configuration
+     */
     void unselectPartType(Category categoryToClear);
+
+    /*
+     * Remove all PartType from configuation
+     */
     void clear();
 }