Better error message when error is received from SABnzbd

src/NzbDrone.Core/Download/Clients/DownloadClientException.cs

@@ -0,0 +1,15 @@
+using NzbDrone.Common.Exceptions;
+
+namespace NzbDrone.Core.Download.Clients
+{
+    public class DownloadClientException : NzbDroneException
+    {
+        public DownloadClientException(string message, params object[] args) : base(message, args)
+        {
+        }
+
+        public DownloadClientException(string message) : base(message)
+        {
+        }
+    }
+}

src/NzbDrone.Core/Download/Clients/Sabnzbd/SabnzbdProxy.cs

@@ -97,7 +97,6 @@ namespace NzbDrone.Core.Download.Clients.Sabnzbd
 
             var response = ProcessRequest(request, action, settings);
             return Json.Deserialize<SabnzbdQueue>(JObject.Parse(response).SelectToken("queue").ToString());
-            
         }
 
         public SabnzbdHistory GetHistory(int start, int limit, SabnzbdSettings settings)
@@ -156,7 +155,7 @@ namespace NzbDrone.Core.Download.Clients.Sabnzbd
             }
             
             if (result.Failed)
-                throw new ApplicationException(result.Error);
+                throw new DownloadClientException("Error response received from SABnzbd: {0}", result.Error);
         }
 
         //TODO: Find a better home for this

src/NzbDrone.Core/Jobs/Scheduler.cs

@@ -47,7 +47,7 @@ namespace NzbDrone.Core.Jobs
                     }
                     catch (Exception e)
                     {
-                        _logger.ErrorException("Error occurred while execution task " + task.TypeName, e);
+                        _logger.ErrorException("Error occurred while executing task " + task.TypeName, e);
                     }
                 }
             }