A little more refactoring: Removed/moved classes, some renames, ...

Added comments for most classes

src/Kp2aBusinessLogic/IKp2aApp.cs

@@ -4,19 +4,46 @@ using KeePassLib.Serialization;
 
 namespace keepass2android
 {
+	/// <summary>
+	/// Interface through which Activities and the logic layer can access some app specific functionalities and Application static data
+	/// </summary>
+	/// This also contains methods which are UI specific and should be replacable for testing.
     public interface IKp2aApp
     {
+
+		/// <summary>
+		/// Set the flag that the database needs to be locked.
+		/// </summary>
         void SetShutdown();
+
+		/// <summary>
+		/// Returns the current database
+		/// </summary>
         Database GetDb();
 
+		/// <summary>
+		/// Tell the app that the file from ioc was opened with keyfile.
+		/// </summary>
         void StoreOpenedFileAsRecent(IOConnectionInfo ioc, string keyfile);
 
+		/// <summary>
+		/// Creates a new database and returns it
+		/// </summary>
         Database CreateNewDatabase();
 
+		/// <summary>
+		/// Returns the user-displayable string identified by stringKey
+		/// </summary>
         string GetResourceString(UiStringKey stringKey);
 
+		/// <summary>
+		/// Returns the value from the preferences corresponding to key
+		/// </summary>
         bool GetBooleanPreference(PreferenceKey key);
 
+		/// <summary>
+		/// Asks the user the question "messageKey" with the options Yes/No/Cancel, calls the handler corresponding to the answer.
+		/// </summary>
         void AskYesNoCancel(UiStringKey titleKey, UiStringKey messageKey, 
             EventHandler<DialogClickEventArgs> yesHandler, 
             EventHandler<DialogClickEventArgs> noHandler, 

src/Kp2aBusinessLogic/KeyFileException.cs

@@ -16,20 +16,12 @@ This file is part of Keepass2Android, Copyright 2013 Philipp Crocoll. This file
   */
 
 using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-
-using Android.App;
-using Android.Content;
-using Android.OS;
-using Android.Runtime;
-using Android.Views;
-using Android.Widget;
 
 namespace keepass2android
 {
-	
+	/// <summary>
+	/// Thrown when there is an error adding the keyfie to the user key
+	/// </summary>
 	[Serializable]
 	public class KeyFileException : Exception
 	{

src/Kp2aBusinessLogic/PreferenceKey.cs

@@ -1,5 +1,8 @@
 namespace keepass2android
 {
+	/// <summary>
+	/// Keys which can be used to get a preference setting
+	/// </summary>
     public enum PreferenceKey
     {
         remember_keyfile,

src/Kp2aBusinessLogic/ProgressTask.cs

@@ -22,6 +22,9 @@ using Java.Lang;
 
 namespace keepass2android
 {
+	/// <summary>
+	/// Class to run a task while a progress dialog is shown
+	/// </summary>
 	public class ProgressTask {
 		private readonly Handler _handler;
 		private readonly RunnableOnFinish _task;

src/Kp2aBusinessLogic/SearchDbHelper.cs

@@ -23,6 +23,9 @@ using KeePassLib.Utility;
 
 namespace keepass2android
 {
+	/// <summary>
+	/// Helper class providing methods to search a given database for specific things
+	/// </summary>
 	public class SearchDbHelper
 	{
         private readonly IKp2aApp _app;
@@ -86,21 +89,21 @@ namespace keepass2android
 			
 		}
 
-		private String extractHost(String url)
+		private static String ExtractHost(String url)
 		{
 			return UrlUtil.GetHost(url.Trim());
 		}
 
 		public PwGroup SearchForHost(Database database, String url, bool allowSubdomains)
 		{
-			String host = extractHost(url);
+			String host = ExtractHost(url);
 			string strGroupName = _app.GetResourceString(UiStringKey.search_results) + " (\"" + host + "\")";
 			PwGroup pgResults = new PwGroup(true, true, strGroupName, PwIcon.EMailSearch) {IsVirtual = true};
 			if (String.IsNullOrWhiteSpace(host))
 				return pgResults;
 			foreach (PwEntry entry in database.Entries.Values)
 			{
-				String otherHost = extractHost(entry.Strings.ReadSafe(PwDefs.UrlField));
+				String otherHost = ExtractHost(entry.Strings.ReadSafe(PwDefs.UrlField));
 				if ((allowSubdomains) && (otherHost.StartsWith("www.")))
 					otherHost = otherHost.Substring(4); //remove "www."
 				if (String.IsNullOrWhiteSpace(otherHost))

src/Kp2aBusinessLogic/UpdateStatus.cs

@@ -22,6 +22,9 @@ using KeePassLib.Interfaces;
 
 namespace keepass2android
 {
+	/// <summary>
+	/// StatusLogger implementation which shows the progress in a progress dialog
+	/// </summary>
 	public class UpdateStatus: IStatusLogger {
 		private readonly ProgressDialog _progressDialog;
 		readonly IKp2aApp _app;