diff --git a/server/src/main/java/fr/lnl/game/server/ServerMain.java b/server/src/main/java/fr/lnl/game/server/ServerMain.java
new file mode 100644
index 0000000..190225a
--- /dev/null
+++ b/server/src/main/java/fr/lnl/game/server/ServerMain.java
@@ -0,0 +1,12 @@
+package fr.lnl.game.server;
+
+import fr.lnl.game.server.games.grid.Grid;
+
+public class ServerMain {
+
+    public static void main(String[] args) {
+        Grid grid = new Grid(10,10);
+        grid.initGrid();
+        grid.printGrid();
+    }
+}
diff --git a/server/src/main/java/fr/lnl/game/server/games/action/AbstractAction.java b/server/src/main/java/fr/lnl/game/server/games/action/AbstractAction.java
new file mode 100644
index 0000000..b4c0902
--- /dev/null
+++ b/server/src/main/java/fr/lnl/game/server/games/action/AbstractAction.java
@@ -0,0 +1,4 @@
+package fr.lnl.game.server.games.action;
+
+public abstract class AbstractAction implements Action {
+}
diff --git a/server/src/main/java/fr/lnl/game/server/games/action/DeployShield.java b/server/src/main/java/fr/lnl/game/server/games/action/DeployShield.java
index a5130c8..28d2978 100644
--- a/server/src/main/java/fr/lnl/game/server/games/action/DeployShield.java
+++ b/server/src/main/java/fr/lnl/game/server/games/action/DeployShield.java
@@ -1,6 +1,6 @@
 package fr.lnl.game.server.games.action;
 
-public class DeployShield implements Action{
+public class DeployShield extends AbstractAction {
     @Override
     public void doAction() {
 
diff --git a/server/src/main/java/fr/lnl/game/server/games/action/DropBomb.java b/server/src/main/java/fr/lnl/game/server/games/action/DropBomb.java
index ea790b2..9279315 100644
--- a/server/src/main/java/fr/lnl/game/server/games/action/DropBomb.java
+++ b/server/src/main/java/fr/lnl/game/server/games/action/DropBomb.java
@@ -1,4 +1,4 @@
 package fr.lnl.game.server.games.action;
 
-public class DropBomb extends DropObject{
+public class DropBomb extends DropObject {
 }
diff --git a/server/src/main/java/fr/lnl/game/server/games/action/DropMine.java b/server/src/main/java/fr/lnl/game/server/games/action/DropMine.java
index 67dc200..c6e69ce 100644
--- a/server/src/main/java/fr/lnl/game/server/games/action/DropMine.java
+++ b/server/src/main/java/fr/lnl/game/server/games/action/DropMine.java
@@ -1,4 +1,4 @@
 package fr.lnl.game.server.games.action;
 
-public class DropMine extends DropObject{
+public class DropMine extends DropObject {
 }
diff --git a/server/src/main/java/fr/lnl/game/server/games/action/DropObject.java b/server/src/main/java/fr/lnl/game/server/games/action/DropObject.java
index 9c83bba..7b1fa17 100644
--- a/server/src/main/java/fr/lnl/game/server/games/action/DropObject.java
+++ b/server/src/main/java/fr/lnl/game/server/games/action/DropObject.java
@@ -1,6 +1,6 @@
 package fr.lnl.game.server.games.action;
 
-public class DropObject implements Action{
+public abstract class DropObject extends AbstractAction {
     @Override
     public void doAction() {
 
diff --git a/server/src/main/java/fr/lnl/game/server/games/action/Move.java b/server/src/main/java/fr/lnl/game/server/games/action/Move.java
index cc98ae3..853f12c 100644
--- a/server/src/main/java/fr/lnl/game/server/games/action/Move.java
+++ b/server/src/main/java/fr/lnl/game/server/games/action/Move.java
@@ -1,6 +1,6 @@
 package fr.lnl.game.server.games.action;
 
-public class Move implements Action{
+public class Move extends AbstractAction {
     @Override
     public void doAction() {
 
diff --git a/server/src/main/java/fr/lnl/game/server/games/action/Nothing.java b/server/src/main/java/fr/lnl/game/server/games/action/Nothing.java
index e76f783..21014f5 100644
--- a/server/src/main/java/fr/lnl/game/server/games/action/Nothing.java
+++ b/server/src/main/java/fr/lnl/game/server/games/action/Nothing.java
@@ -1,6 +1,6 @@
 package fr.lnl.game.server.games.action;
 
-public class Nothing implements Action {
+public class Nothing extends AbstractAction {
     @Override
     public void doAction() {
 
diff --git a/server/src/main/java/fr/lnl/game/server/games/action/Shot.java b/server/src/main/java/fr/lnl/game/server/games/action/Shot.java
index d5a0894..e101eeb 100644
--- a/server/src/main/java/fr/lnl/game/server/games/action/Shot.java
+++ b/server/src/main/java/fr/lnl/game/server/games/action/Shot.java
@@ -1,6 +1,6 @@
 package fr.lnl.game.server.games.action;
 
-public class Shot implements Action{
+public class Shot extends AbstractAction {
     @Override
     public void doAction() {
 
diff --git a/server/src/main/java/fr/lnl/game/server/games/grid/Explosive.java b/server/src/main/java/fr/lnl/game/server/games/grid/Explosive.java
index 562ca9c..f321505 100644
--- a/server/src/main/java/fr/lnl/game/server/games/grid/Explosive.java
+++ b/server/src/main/java/fr/lnl/game/server/games/grid/Explosive.java
@@ -1,4 +1,4 @@
 package fr.lnl.game.server.games.grid;
 
-public class Explosive implements Box{
+public abstract class Explosive implements Box{
 }
diff --git a/server/src/main/java/fr/lnl/game/server/games/grid/Grid.java b/server/src/main/java/fr/lnl/game/server/games/grid/Grid.java
index 9a0e4a9..49ac0f6 100644
--- a/server/src/main/java/fr/lnl/game/server/games/grid/Grid.java
+++ b/server/src/main/java/fr/lnl/game/server/games/grid/Grid.java
@@ -47,6 +47,11 @@ public class Grid {
     }
 
 
+    // TODO: 18/10/2021
+    public void placePlayers() {
+
+    }
+
     public void printGrid() {
         for (int i = 0; i < x; i++) {
             System.out.print("\n");
@@ -77,10 +82,4 @@ public class Grid {
             }
         }
     }
-
-    public static void main(String[] args) {
-        Grid grid = new Grid(10,10);
-        grid.initGrid();
-        grid.printGrid();
-    }
 }
diff --git a/server/src/main/java/fr/lnl/game/server/games/grid/Wall.java b/server/src/main/java/fr/lnl/game/server/games/grid/Wall.java
index 8b1bdf1..06208d4 100644
--- a/server/src/main/java/fr/lnl/game/server/games/grid/Wall.java
+++ b/server/src/main/java/fr/lnl/game/server/games/grid/Wall.java
@@ -2,7 +2,7 @@ package fr.lnl.game.server.games.grid;
 
 import fr.lnl.game.server.utils.Cardinal;
 
-public class Wall implements Box{
+public class Wall implements Box {
 
     private Cardinal cardinal;
     private int x;
diff --git a/server/src/main/java/fr/lnl/game/server/games/player/AbstractPlayer.java b/server/src/main/java/fr/lnl/game/server/games/player/AbstractPlayer.java
index 8bd527f..e4195a4 100644
--- a/server/src/main/java/fr/lnl/game/server/games/player/AbstractPlayer.java
+++ b/server/src/main/java/fr/lnl/game/server/games/player/AbstractPlayer.java
@@ -3,7 +3,7 @@ package fr.lnl.game.server.games.player;
 import fr.lnl.game.server.games.weapon.Weapon;
 import fr.lnl.game.server.utils.Point;
 
-public abstract class AbstractPlayer {
+public abstract class AbstractPlayer implements Player {
 
     private int id;
     private Point position;
diff --git a/server/src/main/java/fr/lnl/game/server/games/player/ComputerPlayer.java b/server/src/main/java/fr/lnl/game/server/games/player/ComputerPlayer.java
index a8bcb66..5428852 100644
--- a/server/src/main/java/fr/lnl/game/server/games/player/ComputerPlayer.java
+++ b/server/src/main/java/fr/lnl/game/server/games/player/ComputerPlayer.java
@@ -3,7 +3,8 @@ package fr.lnl.game.server.games.player;
 import fr.lnl.game.server.games.weapon.Weapon;
 import fr.lnl.game.server.utils.Point;
 
-public class ComputerPlayer extends AbstractPlayer implements Player{
+public class ComputerPlayer extends AbstractPlayer{
+
     public ComputerPlayer(int id, Point position, int energy, Weapon weapon, boolean shieldDeploy) {
         super(id, position, energy, weapon, shieldDeploy);
     }
diff --git a/server/src/main/java/fr/lnl/game/server/games/player/HumanPlayer.java b/server/src/main/java/fr/lnl/game/server/games/player/HumanPlayer.java
index f56bcca..90ce542 100644
--- a/server/src/main/java/fr/lnl/game/server/games/player/HumanPlayer.java
+++ b/server/src/main/java/fr/lnl/game/server/games/player/HumanPlayer.java
@@ -3,7 +3,7 @@ package fr.lnl.game.server.games.player;
 import fr.lnl.game.server.games.weapon.Weapon;
 import fr.lnl.game.server.utils.Point;
 
-public class HumanPlayer extends AbstractPlayer implements Player{
+public class HumanPlayer extends AbstractPlayer {
     public HumanPlayer(int id, Point position, int energy, Weapon weapon, boolean shieldDeploy) {
         super(id, position, energy, weapon, shieldDeploy);
     }
diff --git a/server/src/main/java/fr/lnl/game/server/model/AbstractModelListening.java b/server/src/main/java/fr/lnl/game/server/model/AbstractModelListening.java
index 310daab..148bf98 100644
--- a/server/src/main/java/fr/lnl/game/server/model/AbstractModelListening.java
+++ b/server/src/main/java/fr/lnl/game/server/model/AbstractModelListening.java
@@ -1,10 +1,14 @@
 package fr.lnl.game.server.model;
 import java.util.List;
 
-public abstract class AbstractModelListening implements ModelListener{
+public abstract class AbstractModelListening implements ModelListener {
+
     List<ModelListener> listeners;
+
     public abstract void addListener(ModelListener e);
+
     public abstract void removalListener(ModelListener e);
+
     public void fireChange(){
         for(ModelListener e : listeners){
             e.updateModel(this);
diff --git a/server/src/main/java/fr/lnl/game/server/utils/Cardinal.java b/server/src/main/java/fr/lnl/game/server/utils/Cardinal.java
index 6d38b17..b7dab95 100644
--- a/server/src/main/java/fr/lnl/game/server/utils/Cardinal.java
+++ b/server/src/main/java/fr/lnl/game/server/utils/Cardinal.java
@@ -1,5 +1,12 @@
 package fr.lnl.game.server.utils;
 
 public enum Cardinal {
-    NORTH,SOUTH,EAST,WEST,NORTH_EAST,NORTH_WEST,SOUTH_EAST,SOUTH_WEST
+    NORTH,
+    SOUTH,
+    EAST,
+    WEST,
+    NORTH_EAST,
+    NORTH_WEST,
+    SOUTH_EAST,
+    SOUTH_WEST
 }