Add SoundWrapper class

src/SoundWrapper.java

@@ -0,0 +1,29 @@
+import javax.sound.sampled.LineUnavailableException;
+import javax.sound.sampled.UnsupportedAudioFileException;
+import java.io.*;
+
+public class SoundWrapper implements Serializable {
+    transient public Sound sound;
+    public String soundString;
+
+    // please note that not as many constructors were implemented as BufferedImage, as this class was created before most sounds were added;
+    // as such, backwards compatibility was not needed
+    public SoundWrapper(String soundLocation) throws UnsupportedAudioFileException, LineUnavailableException, IOException {
+        sound = new Sound(soundLocation);
+        soundString = soundLocation;
+    }
+
+    public SoundWrapper() {}
+
+    @Serial
+    private void writeObject(ObjectOutputStream out) throws IOException {
+        out.writeObject(soundString);
+    }
+
+    @Serial
+    private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException, UnsupportedAudioFileException, LineUnavailableException {
+        Object o;
+        o = in.readObject();
+        sound = new Sound((String)o);
+    }
+}