[tasque/transition: 167/213] [libtasque] Make backend IDisposable

[Antonius Riha <antoniusri src gnome org>]

commit 80acc75ac6e1e1638b4f7c96d630c77cc551122a
Author: Antonius Riha <antoniusriha gmail com>
Date:   Sat Aug 18 22:11:59 2012 +0200

    [libtasque] Make backend IDisposable
    
    It actually is already IDisposable, but using its own method (Cleanup).
    Changed it to Dispose pattern.
    Adjustments have been made where necessary.

 src/libtasque/Application.cs |    8 ++++----
 src/libtasque/Backend.cs     |   22 ++++++++++++++++------
 2 files changed, 20 insertions(+), 10 deletions(-)
---
diff --git a/src/libtasque/Application.cs b/src/libtasque/Application.cs
index 7adb421..8b1d406 100644
--- a/src/libtasque/Application.cs
+++ b/src/libtasque/Application.cs
@@ -99,7 +99,7 @@ namespace Tasque
 				// Cleanup the old backend
 				try {
 					Debug.WriteLine ("Cleaning up backend: {0}", backend.Name);
-					backend.Cleanup ();
+					backend.Dispose ();
 				} catch (Exception e) {
 					Trace.TraceWarning ("Exception cleaning up '{0}': {1}", backend.Name, e);
 				}
@@ -197,7 +197,7 @@ namespace Tasque
 			OnQuitting ();
 			
 			if (backend != null)
-				backend.Cleanup ();
+				backend.Dispose ();
 			
 			QuitMainLoop ();
 		}
@@ -237,11 +237,11 @@ namespace Tasque
 		#endregion
 		
 		#region Backend loading and helpers
-		protected void RetryBackend()
+		protected void RetryBackend ()
 		{
 			try {
 				if (backend != null && !backend.Configured) {
-					backend.Cleanup();
+					backend.Dispose();
 					backend.Initialize();
 				}
 			} catch (Exception e) {
diff --git a/src/libtasque/Backend.cs b/src/libtasque/Backend.cs
index 8ee5e42..0b4816b 100644
--- a/src/libtasque/Backend.cs
+++ b/src/libtasque/Backend.cs
@@ -35,7 +35,7 @@ namespace Tasque
 	/// This is the main integration interface for different backends that
 	/// Tasque can use.
 	/// </summary>
-	public abstract class Backend
+	public abstract class Backend : IDisposable
 	{
 		protected Backend (string name)
 		{
@@ -116,14 +116,24 @@ namespace Tasque
 		/// </value>
 		public ReadOnlySortedNotifyCollection<Task> Tasks { get; private set; }
 		#endregion
+
+		#region IDisposable implementation
+		public void Dispose ()
+		{
+			Dispose (true);
+			GC.SuppressFinalize (this);
+		}
+		
+		protected virtual void Dispose (bool disposing) {}
+		
+		~Backend ()
+		{
+			Dispose (false);
+		}
+		#endregion
 		
 		#region Methods
 		/// <summary>
-		/// Cleanup the backend before quitting
-		/// </summary>
-		public abstract void Cleanup ();
-
-		/// <summary>
 		/// Create a new task.
 		/// </summary>
 		public Task CreateTask (string taskName, Category category)