fixed unclosed resources in copy method in mage framework Copier

Mage.Server/src/main/java/mage/server/game/GameReplay.java

@@ -91,7 +91,7 @@ public class GameReplay {
         try{
             file = new FileInputStream("saved/" + gameId.toString() + ".game");
             buffer = new BufferedInputStream(file);
-            input = new CopierObjectInputStream(Main.classLoader, new GZIPInputStream(buffer))
+            input = new CopierObjectInputStream(Main.classLoader, new GZIPInputStream(buffer));
             Game loadGame = (Game) input.readObject();
             GameStates states = (GameStates) input.readObject();
             loadGame.loadGameStates(states);

Mage/src/main/java/mage/util/Copier.java

@@ -50,22 +50,29 @@ public class Copier<T> {
 
     public T copy(T obj) {
         T copy = null;
+
+        FastByteArrayOutputStream fbos = null;
+        ObjectOutputStream out = null;
+        ObjectInputStream in = null;
         try {
-            FastByteArrayOutputStream fbos = new FastByteArrayOutputStream();
-            ObjectOutputStream out= new ObjectOutputStream(fbos);
+            fbos = new FastByteArrayOutputStream();
+            out = new ObjectOutputStream(fbos);
 
             // Write the object out to a byte array
             out.writeObject(obj);
             out.flush();
-            out.close();
 
             // Retrieve an input stream from the byte array and read
             // a copy of the object back in.
-            ObjectInputStream in = new CopierObjectInputStream(loader, fbos.getInputStream());
+            in = new CopierObjectInputStream(loader, fbos.getInputStream());
             copy = (T) in.readObject();
         }
         catch(IOException | ClassNotFoundException e) {
             e.printStackTrace();
+        } finally {
+            StreamUtils.closeQuietly(fbos);
+            StreamUtils.closeQuietly(out);
+            StreamUtils.closeQuietly(in);
         }
         return copy;
 

Mage/src/main/java/mage/util/StreamUtils.java

@@ -0,0 +1,30 @@
+package mage.util;
+
+import java.io.Closeable;
+
+public final class StreamUtils {
+
+    /***
+     * Quietly closes the closable, ignoring nulls and exceptions
+     * @param c - the closable to be closed
+     */
+    public static void closeQuietly(Closeable c) {
+        if (c != null) {
+            try {
+                c.close();
+            }
+            catch (Exception e) {
+            }
+        }
+    }
+
+    public static void closeQuietly(AutoCloseable ac) {
+        if (ac != null) {
+            try {
+                ac.close();
+            }
+            catch (Exception e) {
+            }
+        }
+    }
+}