diff --git a/MediaBrowser.Common/MediaBrowser.Common.csproj b/MediaBrowser.Common/MediaBrowser.Common.csproj
index b136eb43c..a10f36da0 100644
--- a/MediaBrowser.Common/MediaBrowser.Common.csproj
+++ b/MediaBrowser.Common/MediaBrowser.Common.csproj
@@ -135,6 +135,7 @@
     <Compile Include="ScheduledTasks\DailyTrigger.cs" />
     <Compile Include="ScheduledTasks\IntervalTrigger.cs" />
     <Compile Include="ScheduledTasks\WeeklyTrigger.cs" />
+    <Compile Include="Updates\IInstallationManager.cs" />
   </ItemGroup>
   <ItemGroup>
     <None Include="app.config" />
diff --git a/MediaBrowser.Common/Updates/IInstallationManager.cs b/MediaBrowser.Common/Updates/IInstallationManager.cs
new file mode 100644
index 000000000..23c147748
--- /dev/null
+++ b/MediaBrowser.Common/Updates/IInstallationManager.cs
@@ -0,0 +1,119 @@
+using System;
+using System.Collections.Concurrent;
+using System.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
+using MediaBrowser.Common.Events;
+using MediaBrowser.Common.Plugins;
+using MediaBrowser.Model.Updates;
+
+namespace MediaBrowser.Common.Updates
+{
+    public interface IInstallationManager
+    {
+        /// <summary>
+        /// The current installations
+        /// </summary>
+        List<Tuple<InstallationInfo, CancellationTokenSource>> CurrentInstallations { get; set; }
+
+        /// <summary>
+        /// The completed installations
+        /// </summary>
+        ConcurrentBag<InstallationInfo> CompletedInstallations { get; set; }
+        
+        /// <summary>
+        /// Occurs when [plugin uninstalled].
+        /// </summary>
+        event EventHandler<GenericEventArgs<IPlugin>> PluginUninstalled;
+
+        /// <summary>
+        /// Occurs when [plugin updated].
+        /// </summary>
+        event EventHandler<GenericEventArgs<Tuple<IPlugin, PackageVersionInfo>>> PluginUpdated;
+
+        /// <summary>
+        /// Called when [plugin updated].
+        /// </summary>
+        /// <param name="plugin">The plugin.</param>
+        /// <param name="newVersion">The new version.</param>
+        void OnPluginUpdated(IPlugin plugin, PackageVersionInfo newVersion);
+
+        /// <summary>
+        /// Occurs when [plugin updated].
+        /// </summary>
+        event EventHandler<GenericEventArgs<PackageVersionInfo>> PluginInstalled;
+
+        /// <summary>
+        /// Called when [plugin installed].
+        /// </summary>
+        /// <param name="package">The package.</param>
+        void OnPluginInstalled(PackageVersionInfo package);
+
+        /// <summary>
+        /// Gets all available packages.
+        /// </summary>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <param name="packageType">Type of the package.</param>
+        /// <param name="applicationVersion">The application version.</param>
+        /// <returns>Task{List{PackageInfo}}.</returns>
+        Task<IEnumerable<PackageInfo>> GetAvailablePackages(CancellationToken cancellationToken,
+                                                                                  PackageType? packageType = null,
+                                                                                  Version applicationVersion = null);
+
+        /// <summary>
+        /// Gets the package.
+        /// </summary>
+        /// <param name="name">The name.</param>
+        /// <param name="classification">The classification.</param>
+        /// <param name="version">The version.</param>
+        /// <returns>Task{PackageVersionInfo}.</returns>
+        Task<PackageVersionInfo> GetPackage(string name, PackageVersionClass classification, Version version);
+
+        /// <summary>
+        /// Gets the latest compatible version.
+        /// </summary>
+        /// <param name="name">The name.</param>
+        /// <param name="classification">The classification.</param>
+        /// <returns>Task{PackageVersionInfo}.</returns>
+        Task<PackageVersionInfo> GetLatestCompatibleVersion(string name, PackageVersionClass classification = PackageVersionClass.Release);
+
+        /// <summary>
+        /// Gets the latest compatible version.
+        /// </summary>
+        /// <param name="availablePackages">The available packages.</param>
+        /// <param name="name">The name.</param>
+        /// <param name="classification">The classification.</param>
+        /// <returns>PackageVersionInfo.</returns>
+        PackageVersionInfo GetLatestCompatibleVersion(IEnumerable<PackageInfo> availablePackages, string name, PackageVersionClass classification = PackageVersionClass.Release);
+
+        /// <summary>
+        /// Gets the available plugin updates.
+        /// </summary>
+        /// <param name="withAutoUpdateEnabled">if set to <c>true</c> [with auto update enabled].</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>Task{IEnumerable{PackageVersionInfo}}.</returns>
+        Task<IEnumerable<PackageVersionInfo>> GetAvailablePluginUpdates(bool withAutoUpdateEnabled, CancellationToken cancellationToken);
+
+        /// <summary>
+        /// Installs the package.
+        /// </summary>
+        /// <param name="package">The package.</param>
+        /// <param name="progress">The progress.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>Task.</returns>
+        /// <exception cref="System.ArgumentNullException">package</exception>
+        Task InstallPackage(PackageVersionInfo package, IProgress<double> progress, CancellationToken cancellationToken);
+
+        /// <summary>
+        /// Uninstalls a plugin
+        /// </summary>
+        /// <param name="plugin">The plugin.</param>
+        /// <exception cref="System.ArgumentException"></exception>
+        void UninstallPlugin(IPlugin plugin);
+
+        /// <summary>
+        /// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
+        /// </summary>
+        void Dispose();
+    }
+}
\ No newline at end of file
diff --git a/MediaBrowser.Controller/Kernel.cs b/MediaBrowser.Controller/Kernel.cs
index 7cb838e44..a4af76805 100644
--- a/MediaBrowser.Controller/Kernel.cs
+++ b/MediaBrowser.Controller/Kernel.cs
@@ -1,6 +1,7 @@
 using MediaBrowser.Common.Kernel;
 using MediaBrowser.Common.Plugins;
 using MediaBrowser.Common.ScheduledTasks;
+using MediaBrowser.Common.Updates;
 using MediaBrowser.Controller.Drawing;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.IO;
@@ -70,7 +71,7 @@ namespace MediaBrowser.Controller
         /// Gets the installation manager.
         /// </summary>
         /// <value>The installation manager.</value>
-        public InstallationManager InstallationManager { get; private set; }
+        public IInstallationManager InstallationManager { get; private set; }
 
         /// <summary>
         /// Gets or sets the file system manager.
diff --git a/MediaBrowser.Controller/Updates/InstallationManager.cs b/MediaBrowser.Controller/Updates/InstallationManager.cs
index efef87f86..64b72ae63 100644
--- a/MediaBrowser.Controller/Updates/InstallationManager.cs
+++ b/MediaBrowser.Controller/Updates/InstallationManager.cs
@@ -3,6 +3,7 @@ using MediaBrowser.Common.Kernel;
 using MediaBrowser.Common.Net;
 using MediaBrowser.Common.Plugins;
 using MediaBrowser.Common.Progress;
+using MediaBrowser.Common.Updates;
 using MediaBrowser.Model.IO;
 using MediaBrowser.Model.Logging;
 using MediaBrowser.Model.Serialization;
@@ -21,18 +22,18 @@ namespace MediaBrowser.Controller.Updates
     /// <summary>
     /// Manages all install, uninstall and update operations (both plugins and system)
     /// </summary>
-    public class InstallationManager : BaseManager<Kernel>
+    public class InstallationManager : BaseManager<Kernel>, IInstallationManager
     {
         /// <summary>
         /// The current installations
         /// </summary>
-        public readonly List<Tuple<InstallationInfo, CancellationTokenSource>> CurrentInstallations =
-            new List<Tuple<InstallationInfo, CancellationTokenSource>>();
+        public List<Tuple<InstallationInfo, CancellationTokenSource>> CurrentInstallations { get; set; }
+            
 
         /// <summary>
         /// The completed installations
         /// </summary>
-        public readonly ConcurrentBag<InstallationInfo> CompletedInstallations = new ConcurrentBag<InstallationInfo>();
+        public ConcurrentBag<InstallationInfo> CompletedInstallations { get; set; }
 
         #region PluginUninstalled Event
         /// <summary>
@@ -161,6 +162,8 @@ namespace MediaBrowser.Controller.Updates
                 throw new ArgumentNullException("httpClient");
             }
 
+            CurrentInstallations = new List<Tuple<InstallationInfo, CancellationTokenSource>>();
+            CompletedInstallations = new ConcurrentBag<InstallationInfo>();
             JsonSerializer = jsonSerializer;
             HttpClient = httpClient;
             ApplicationHost = appHost;