Create skeleton class for JavaAudioEngine

src/main/java/sh/ball/audio/engine/JavaAudioEngine.java

@@ -0,0 +1,34 @@
+package sh.ball.audio.engine;
+
+import sh.ball.shapes.Vector2;
+
+import java.util.List;
+import java.util.concurrent.Callable;
+
+public class JavaAudioEngine implements AudioEngine {
+
+  @Override
+  public boolean isPlaying() {
+    return false;
+  }
+
+  @Override
+  public void play(Callable<Vector2> channelGenerator, AudioDevice device) throws Exception {
+
+  }
+
+  @Override
+  public void stop() {
+
+  }
+
+  @Override
+  public List<AudioDevice> devices() {
+    return null;
+  }
+
+  @Override
+  public AudioDevice getDefaultDevice() {
+    return null;
+  }
+}