Engine refactor

Author: walpurr

app/src/main/java/hexlet/code/games/Engine.java

@@ -7,7 +7,7 @@ public class Engine {
     private static String userName;
     private static boolean defeated = false;
     private static int round = 1;
-    private static Random randomizer = new Random();
+    private static final Random randomizer = new Random();
 
     public static void greet(Scanner scanner) {
         System.out.println("Welcome to the Brain Games!");
@@ -37,10 +37,10 @@ public static void compareAnswers(String userAnswer, String correctAnswer) {
     public static void end(Scanner scanner) {
         if (defeated) {
             System.out.println("Let's try again, " + userName + "!");
-            scanner.close();
         } else {
             System.out.println("Congratulations, " + userName + "!");
-            scanner.close();
         }
+
+        scanner.close();
     }
 }