DocumentViewer: Better logging

Controls.DocumentViewer/DocumentViewer.vb

@@ -69,6 +69,7 @@ Public Class DocumentViewer
     ''' Terminate Viewer, freeing up resources and deleting temp files
     ''' </summary>
     Public Sub Done()
+        Try
             _logger.Debug("Done: Deleting Temp Files")
             DeleteTempFiles()
 
@@ -77,6 +78,10 @@ Public Class DocumentViewer
 
             _logger.Debug("Done: Triggering GC")
             GC.Collect()
+        Catch ex As Exception
+            _logger.Warn("Error while cleaning up DocumentViewer")
+            _logger.Error(ex)
+        End Try
     End Sub
 
     ''' <summary>
@@ -125,8 +130,12 @@ Public Class DocumentViewer
     End Sub
 
     Public Sub CloseDocument()
+        Try
             GdViewer.CloseDocument()
             UpdateMainUi()
+        Catch ex As Exception
+            _logger.Error(ex)
+        End Try
     End Sub
 
     Public Sub DeleteTempFiles()
@@ -162,13 +171,16 @@ Public Class DocumentViewer
             Dim oExtension As String = _Fileinfo.Extension.ToUpper
             Select Case _ViewerMode
                 Case ViewerMode.RichText
+                    _logger.Debug("Closing RichText Editor")
                     RichEditControl1.CreateNewDocument()
 
                 Case ViewerMode.Excel
+                    _logger.Debug("Closing Excel Editor")
                     SpreadsheetControl1.CreateNewDocument()
 
                 Case Else
-                    GdViewer.CloseDocument()
+                    _logger.Debug("Closing GDPicture Viewer")
+                    GdViewer.Dispose()
 
             End Select
         Catch ex As Exception