Restructuring. Added services.

Aurora/Backend/Models/BaseSong.cs

@@ -0,0 +1,56 @@
+using System;
+namespace Aurora.Backend.Models
+{
+    public abstract class BaseSong
+    {
+        public BaseSong()
+        {
+            Id = Guid.NewGuid().ToString();
+        }
+
+        #region Properties
+        public string Id { get; private set; }
+
+        /// <summary>
+        /// The title of the song.
+        /// </summary>
+        /// <value></value>
+        public string Title { get; set; }
+
+        /// <summary>
+        /// The artist of the song.
+        /// </summary>
+        /// <value></value>
+        public string Artist { get; set; }
+
+        /// <summary>
+        /// The album from which the song belongs.
+        /// </summary>
+        /// <value></value>
+        public string Album { get; set; }
+
+        /// <summary>
+        /// The duration of the song.
+        /// </summary>
+        /// <value></value>
+        public string Duration { get; set; }
+
+        /// <summary>
+        /// Extra data associated with a song.
+        /// </summary>
+        /// <value></value>
+        public object Metadata { get; set; }
+
+
+        #endregion Properties
+
+        #region Methods
+        /// <summary>
+        /// Play this instance.
+        /// </summary>
+        public abstract void Play();
+
+        #endregion
+    }
+
+}

Aurora/Backend/Models/LocalSong.cs

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+using System;
+using System.IO;
+
+namespace Aurora.Backend.Models
+{
+    public class LocalSong : BaseSong
+    {
+        public LocalSong(FileInfo fileInfo)
+        {
+            File = fileInfo;
+        }
+
+        #region Properties
+        public FileInfo File { get; private set; }
+
+        #endregion Properties
+
+        #region Methods
+        public override void Play()
+        {
+            throw new NotImplementedException();
+        }
+
+        #endregion Methods
+    }
+}