juste better

app/src/main/java/chess/App.java

@@ -3,16 +3,22 @@
  */
 package chess;
 
+import chess.io.CommandExecutor;
+import chess.io.commands.NewGameCommand;
 import chess.model.ChessBoard;
 import chess.model.Game;
 import chess.simplerender.Window;
 
 public class App {
-    public String getGreeting() {
-        return "Hello World!";
-    }
-
     public static void main(String[] args) {
-        new Window(new Game(new ChessBoard()));
+        CommandExecutor commandExecutor = new CommandExecutor();
+        
+        Game game = new Game(new ChessBoard());
+        Window window = new Window(commandExecutor);
+        
+        commandExecutor.setGame(game);
+        commandExecutor.setOutputSystem(window);
+
+        commandExecutor.executeCommand(new NewGameCommand());
     }
 }