diff --git a/src/main/java/fr/ntr/Cell.java b/src/main/java/fr/ntr/Cell.java
index c6d737b..70afe41 100644
--- a/src/main/java/fr/ntr/Cell.java
+++ b/src/main/java/fr/ntr/Cell.java
@@ -7,11 +7,11 @@ import java.util.Random;
 
 public class Cell {
 
-    private List<User> users;
+    private final List<User> users;
     /**
      * scheduler utilisé par la cellule
      */
-    private Scheduler scheduler;
+    private final Scheduler scheduler;
     /**
      * Nombre de slots
      */
@@ -23,7 +23,7 @@ public class Cell {
     /**
      * Trame
      */
-    private ResourceBlock[][] frame;
+    private final ResourceBlock[][] frame;
     /**
      * Reste pour la prochaine source
      */
diff --git a/src/main/java/fr/ntr/User.java b/src/main/java/fr/ntr/User.java
index ec7e659..8c786e9 100644
--- a/src/main/java/fr/ntr/User.java
+++ b/src/main/java/fr/ntr/User.java
@@ -12,7 +12,7 @@ public class User {
     private final List<Packets> packetsSent;
     private int leftForNextSource;
 
-    private Random random = new Random();
+    private final Random random = new Random();
 
     public User(double distance, int timeSlotNb,  int subCarrierNb) {
         this.distance = distance;
@@ -38,9 +38,9 @@ public class User {
     
     /**
      * 
-     * @param m
+     * @param m un truc
      * @param ticks qui va définir le temps auquel a été créé un paquet
-     * @return
+     * @return  mbis
      */
     public int createPackets(int m, int ticks) {
         Random random = new Random();
diff --git a/src/main/java/fr/ntr/scheduler/MaxSNR.java b/src/main/java/fr/ntr/scheduler/MaxSNR.java
index 504d1f5..0f4f10a 100644
--- a/src/main/java/fr/ntr/scheduler/MaxSNR.java
+++ b/src/main/java/fr/ntr/scheduler/MaxSNR.java
@@ -6,8 +6,8 @@ import fr.ntr.User;
 
 public class MaxSNR extends Scheduler {
 
-	private List<User> users;
-	private ResourceBlock[][] frame;
+	private final List<User> users;
+	private final ResourceBlock[][] frame;
 
 	public MaxSNR( ResourceBlock[][] frame, List<User> users) {
 		this.frame = frame;
@@ -16,7 +16,7 @@ public class MaxSNR extends Scheduler {
 
 	@Override
 	public void scheduling() {
-		User userMax = null;
+		User userMax;
 		for(int ts = 0; ts < 2; ts++){
 			for(int sp = 0; sp < 100; sp++){
 				userMax = selectionUtilisateur(sp, ts, users);
diff --git a/src/main/java/fr/ntr/scheduler/ProportionalFair.java b/src/main/java/fr/ntr/scheduler/ProportionalFair.java
index 9e68531..b11e5b4 100644
--- a/src/main/java/fr/ntr/scheduler/ProportionalFair.java
+++ b/src/main/java/fr/ntr/scheduler/ProportionalFair.java
@@ -7,9 +7,9 @@ import fr.ntr.User;
 
 public class ProportionalFair extends Scheduler {
 
-	private String name;
-	private List<User> users;
-	private ResourceBlock[][] frame;
+	private final String name;
+	private final List<User> users;
+	private final ResourceBlock[][] frame;
 
 	public ProportionalFair(String name, ResourceBlock[][] frame, List<User> users) {
 		this.name = name;