diff --git a/src/fr/iut_fbleau/raw_api_body/entity/Plateau.java b/src/fr/iut_fbleau/raw_api_body/entity/Plateau.java
index c5beff8..cdb9c91 100644
--- a/src/fr/iut_fbleau/raw_api_body/entity/Plateau.java
+++ b/src/fr/iut_fbleau/raw_api_body/entity/Plateau.java
@@ -10,6 +10,8 @@ public interface Plateau {
     /**
      * Return the current player
      *
+     * @throws NullPointerException if the game is over
+     *
      * @return the player
      */
     Player getPlayer();
@@ -29,29 +31,36 @@ public interface Plateau {
      * - if the move is a draw : 0
      * - if its a defeat move : -1
      *
+     * @throws NullPointerException if game is not over
+     *
      * @return the result
      */
     Result getResult();
 
     /**
-     * Gives previous played plies
+     * List next legals moves
      *
+     * @throws NullPointerException if the game is over
      * @return the iterator
      */
     Iterator<Ply> givePlies();
 
     /**
-     * Play a ply
+     * Play a future ply
+     *
+     * @throws IllegalArgumentException if the given ply is coming from wrong game
      *
      * @param ply the ply
      */
-    void doo(Ply ply);
+    void doPly(Ply ply);
 
     /**
-     * Removed a ply.
+     * Removed a previous ply.
+     *
+     * @throws IllegalStateException if not allowed to come back on previous statement
      *
      * @param ply the ply
      */
-    void undo(Ply ply);
+    void undoPly(Ply ply);
 
 }