Index: Application/Ringtoets/src/Application.Ringtoets.Storage/Application.Ringtoets.Storage.csproj
===================================================================
diff -u -re2e6d944af7b0cea6c9c34e77bd0644149526c37 -rbdc1bbd84aa923749a80dfb0cf20f5bbcb54b3fc
--- Application/Ringtoets/src/Application.Ringtoets.Storage/Application.Ringtoets.Storage.csproj	(.../Application.Ringtoets.Storage.csproj)	(revision e2e6d944af7b0cea6c9c34e77bd0644149526c37)
+++ Application/Ringtoets/src/Application.Ringtoets.Storage/Application.Ringtoets.Storage.csproj	(.../Application.Ringtoets.Storage.csproj)	(revision bdc1bbd84aa923749a80dfb0cf20f5bbcb54b3fc)
@@ -36,6 +36,10 @@
       <HintPath>..\..\..\..\packages\EntityFramework.6.1.3\lib\net40\EntityFramework.dll</HintPath>
       <Private>True</Private>
     </Reference>
+    <Reference Include="log4net, Version=1.2.14.0, Culture=neutral, PublicKeyToken=669e0ddf0bb1aa2a, processorArchitecture=MSIL">
+      <HintPath>..\..\..\..\packages\log4net.2.0.4\lib\net40-full\log4net.dll</HintPath>
+      <Private>True</Private>
+    </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />
     <Reference Include="System.Data" />
@@ -249,6 +253,7 @@
     </Compile>
     <Compile Include="DecimalConversionExtensions.cs" />
     <Compile Include="DoubleConversionExtensions.cs" />
+    <Compile Include="Exceptions\CannotDeleteBackupFileException.cs" />
     <Compile Include="IStorableExtensions.cs" />
     <Compile Include="Read\CalculationGroupEntityReadExtentions.cs" />
     <Compile Include="Read\ClosingStructureSectionResultEntityReadExtensions.cs" />
Index: Application/Ringtoets/src/Application.Ringtoets.Storage/BackedUpFileWriter.cs
===================================================================
diff -u -r1803a3e6fa50608dd2498ad746126400253cdec5 -rbdc1bbd84aa923749a80dfb0cf20f5bbcb54b3fc
--- Application/Ringtoets/src/Application.Ringtoets.Storage/BackedUpFileWriter.cs	(.../BackedUpFileWriter.cs)	(revision 1803a3e6fa50608dd2498ad746126400253cdec5)
+++ Application/Ringtoets/src/Application.Ringtoets.Storage/BackedUpFileWriter.cs	(.../BackedUpFileWriter.cs)	(revision bdc1bbd84aa923749a80dfb0cf20f5bbcb54b3fc)
@@ -21,6 +21,8 @@
 
 using System;
 using System.IO;
+
+using Application.Ringtoets.Storage.Exceptions;
 using Application.Ringtoets.Storage.Properties;
 using Core.Common.Utils;
 
@@ -61,9 +63,9 @@
         /// <item>The temporary file already exists and cannot be deleted.</item>
         /// <item>The temporary file cannot be created from the target file.</item>
         /// <item>When reverting, the original file cannot be restored.</item>
-        /// <item>When cleaning up, the temporary file cannot be removed.</item>
         /// </list>
         /// </exception>
+        /// <exception cref="CannotDeleteBackupFileException">When cleaning up, the temporary file cannot be removed.</exception>
         /// <remark>Any <see cref="Exception"/> thrown by <paramref name="writeAction"/> will be rethrown.</remark>
         public void Perform(Action writeAction)
         {
@@ -84,7 +86,7 @@
         /// <summary>
         /// Removes the temporary file if it was created.
         /// </summary>
-        /// <exception cref="IOException">The temporary file cannot be removed.</exception>
+        /// <exception cref="CannotDeleteBackupFileException">The temporary file cannot be removed.</exception>
         private void Finish()
         {
             if (isTemporaryFileCreated)
@@ -209,7 +211,7 @@
         /// <summary>
         /// Deletes the created temporary file.
         /// </summary>
-        /// <exception cref="IOException">The temporary file cannot be removed.</exception>
+        /// <exception cref="CannotDeleteBackupFileException">The temporary file cannot be removed.</exception>
         private void DeleteTemporaryFile()
         {
             try
@@ -223,7 +225,7 @@
                     var message = string.Format(
                         Resources.SafeOverwriteFileHelper_DeleteTemporaryFile_Cannot_remove_temporary_FilePath_0_Try_removing_manually, 
                         temporaryFilePath);
-                    throw new IOException(message, e);
+                    throw new CannotDeleteBackupFileException(message, e);
                 }
                 throw;
             }
Index: Application/Ringtoets/src/Application.Ringtoets.Storage/Exceptions/CannotDeleteBackupFileException.cs
===================================================================
diff -u
--- Application/Ringtoets/src/Application.Ringtoets.Storage/Exceptions/CannotDeleteBackupFileException.cs	(revision 0)
+++ Application/Ringtoets/src/Application.Ringtoets.Storage/Exceptions/CannotDeleteBackupFileException.cs	(revision bdc1bbd84aa923749a80dfb0cf20f5bbcb54b3fc)
@@ -0,0 +1,53 @@
+// Copyright (C) Stichting Deltares 2016. All rights reserved.
+//
+// This file is part of Ringtoets.
+//
+// Ringtoets is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+//
+// All names, logos, and references to "Deltares" are registered trademarks of
+// Stichting Deltares and remain full property of Stichting Deltares at all times.
+// All rights reserved.
+
+using System;
+
+namespace Application.Ringtoets.Storage.Exceptions
+{
+    /// <summary>
+    /// The exception that is thrown when the original file cannot be restored by <see cref="BackedUpFileWriter"/>.
+    /// </summary>
+    public class CannotDeleteBackupFileException : Exception
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="CannotDeleteBackupFileException"/> class.
+        /// </summary>
+        public CannotDeleteBackupFileException() {}
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="CannotDeleteBackupFileException"/> class
+        /// with a specified error message.
+        /// </summary>
+        /// <param name="message">The error message that explains the reason for the exception.</param>
+        public CannotDeleteBackupFileException(string message) : base(message) {}
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="CannotDeleteBackupFileException"/> class
+        /// with a specified error message and a reference to the inner exception that is
+        /// the cause of this exception.
+        /// </summary>
+        /// <param name="message">The error message that explains the reason for the exception.</param>
+        /// <param name="inner">The exception that is the cause of the current exception, 
+        /// or a null reference if no inner exception is specified.</param>
+        public CannotDeleteBackupFileException(string message, Exception inner) : base(message, inner) { }
+    }
+}
\ No newline at end of file
Index: Application/Ringtoets/src/Application.Ringtoets.Storage/StorageSqLite.cs
===================================================================
diff -u -re2e6d944af7b0cea6c9c34e77bd0644149526c37 -rbdc1bbd84aa923749a80dfb0cf20f5bbcb54b3fc
--- Application/Ringtoets/src/Application.Ringtoets.Storage/StorageSqLite.cs	(.../StorageSqLite.cs)	(revision e2e6d944af7b0cea6c9c34e77bd0644149526c37)
+++ Application/Ringtoets/src/Application.Ringtoets.Storage/StorageSqLite.cs	(.../StorageSqLite.cs)	(revision bdc1bbd84aa923749a80dfb0cf20f5bbcb54b3fc)
@@ -34,6 +34,9 @@
 using Core.Common.Base.Storage;
 using Core.Common.Utils;
 using Core.Common.Utils.Builders;
+
+using log4net;
+
 using Ringtoets.Integration.Data;
 using UtilsResources = Core.Common.Utils.Properties.Resources;
 
@@ -44,6 +47,8 @@
     /// </summary>
     public class StorageSqLite : IStoreProject
     {
+        private static ILog log = LogManager.GetLogger(typeof(StorageSqLite));
+
         private string connectionString;
 
         public string FileFilter
@@ -90,6 +95,10 @@
             {
                 throw new StorageException(e.Message, e);
             }
+            catch (CannotDeleteBackupFileException e)
+            {
+                log.Warn(e.Message);
+            }
         }
 
         /// <summary>
@@ -134,7 +143,7 @@
         /// Attempts to load the <see cref="IProject"/> from the SQLite database.
         /// </summary>
         /// <param name="databaseFilePath">Path to database file.</param>
-        /// <returns>Returns a new instance of <see cref="Project"/> with the data from the database or <c>null</c> when not found.</returns>
+        /// <returns>Returns a new instance of <see cref="IProject"/> with the data from the database or <c>null</c> when not found.</returns>
         /// <exception cref="ArgumentException"><paramref name="databaseFilePath"/> is invalid.</exception>
         /// <exception cref="StorageException">Thrown when
         /// <list type="bullet">
Index: Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Application.Ringtoets.Storage.Test.csproj
===================================================================
diff -u -re2e6d944af7b0cea6c9c34e77bd0644149526c37 -rbdc1bbd84aa923749a80dfb0cf20f5bbcb54b3fc
--- Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Application.Ringtoets.Storage.Test.csproj	(.../Application.Ringtoets.Storage.Test.csproj)	(revision e2e6d944af7b0cea6c9c34e77bd0644149526c37)
+++ Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Application.Ringtoets.Storage.Test.csproj	(.../Application.Ringtoets.Storage.Test.csproj)	(revision bdc1bbd84aa923749a80dfb0cf20f5bbcb54b3fc)
@@ -47,6 +47,10 @@
       <HintPath>..\..\..\..\packages\Fluent.Ribbon.3.4.0\lib\net40\Fluent.dll</HintPath>
       <Private>True</Private>
     </Reference>
+    <Reference Include="log4net, Version=1.2.14.0, Culture=neutral, PublicKeyToken=669e0ddf0bb1aa2a, processorArchitecture=MSIL">
+      <HintPath>..\..\..\..\packages\log4net.2.0.4\lib\net40-full\log4net.dll</HintPath>
+      <Private>True</Private>
+    </Reference>
     <Reference Include="Microsoft.Windows.Shell, Version=3.5.41019.1, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
       <HintPath>..\..\..\..\packages\Fluent.Ribbon.3.4.0\lib\net40\Microsoft.Windows.Shell.dll</HintPath>
       <Private>True</Private>
@@ -145,6 +149,7 @@
     <Compile Include="Create\WaveImpactAsphaltCover\WaveImpactAsphaltCoverFailureMechanismSectionResultCreateExtensionsTest.cs" />
     <Compile Include="DecimalConversionExtensionsTests.cs" />
     <Compile Include="DoubleConversionExtensionsTest.cs" />
+    <Compile Include="Exceptions\CannotDeleteBackupFileExceptionTest.cs" />
     <Compile Include="IStorableExtensionsTest.cs" />
     <Compile Include="Read\AssessmentSectionEntityReadExtensionsTest.cs" />
     <Compile Include="Read\CalculationGroupEntityReadExtentionsTest.cs" />
Index: Application/Ringtoets/test/Application.Ringtoets.Storage.Test/BackedUpFileWriterTest.cs
===================================================================
diff -u -r915779f7cc008eb27b22811020a7dd0e5d004435 -rbdc1bbd84aa923749a80dfb0cf20f5bbcb54b3fc
--- Application/Ringtoets/test/Application.Ringtoets.Storage.Test/BackedUpFileWriterTest.cs	(.../BackedUpFileWriterTest.cs)	(revision 915779f7cc008eb27b22811020a7dd0e5d004435)
+++ Application/Ringtoets/test/Application.Ringtoets.Storage.Test/BackedUpFileWriterTest.cs	(.../BackedUpFileWriterTest.cs)	(revision bdc1bbd84aa923749a80dfb0cf20f5bbcb54b3fc)
@@ -23,6 +23,9 @@
 using System.IO;
 using System.Security.AccessControl;
 using System.Security.Principal;
+
+using Application.Ringtoets.Storage.Exceptions;
+
 using NUnit.Framework;
 
 namespace Application.Ringtoets.Storage.Test
@@ -263,7 +266,7 @@
                 var expectedMessage = string.Format(
                     "Kan het tijdelijke bestand ({0}) niet opruimen. Het tijdelijke bestand dient handmatig verwijderd te worden.", 
                     temporaryFilePath);
-                var message = Assert.Throws<IOException>(test).Message;
+                var message = Assert.Throws<CannotDeleteBackupFileException>(test).Message;
                 Assert.AreEqual(expectedMessage, message);
             }
             finally
Index: Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Exceptions/CannotDeleteBackupFileExceptionTest.cs
===================================================================
diff -u
--- Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Exceptions/CannotDeleteBackupFileExceptionTest.cs	(revision 0)
+++ Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Exceptions/CannotDeleteBackupFileExceptionTest.cs	(revision bdc1bbd84aa923749a80dfb0cf20f5bbcb54b3fc)
@@ -0,0 +1,79 @@
+// Copyright (C) Stichting Deltares 2016. All rights reserved.
+//
+// This file is part of Ringtoets.
+//
+// Ringtoets is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+//
+// All names, logos, and references to "Deltares" are registered trademarks of
+// Stichting Deltares and remain full property of Stichting Deltares at all times.
+// All rights reserved.
+
+using System;
+
+using Application.Ringtoets.Storage.Exceptions;
+
+using NUnit.Framework;
+
+namespace Application.Ringtoets.Storage.Test.Exceptions
+{
+    [TestFixture]
+    public class CannotDeleteBackupFileExceptionTest
+    {
+        [Test]
+        public void DefaultConstructor_InnerExceptionNullAndMessageDefault()
+        {
+            // Setup
+            string expectedMessage = String.Format("Exception of type '{0}' was thrown.", typeof(EntityNotFoundException).FullName);
+
+            // Call
+            var exception = new CannotDeleteBackupFileException();
+
+            // Assert
+            Assert.IsInstanceOf<Exception>(exception);
+            Assert.IsNull(exception.InnerException);
+            Assert.AreEqual(expectedMessage, exception.Message);
+        }
+
+        [Test]
+        public void Constructor_WithCustomMessage_InnerExceptionNullAndMessageSetToCustom()
+        {
+            // Setup
+            const string expectedMessage = "Some exception message";
+
+            // Call
+            var exception = new CannotDeleteBackupFileException(expectedMessage);
+
+            // Assert
+            Assert.IsInstanceOf<Exception>(exception);
+            Assert.IsNull(exception.InnerException);
+            Assert.AreEqual(expectedMessage, exception.Message);
+        }
+
+        [Test]
+        public void Constructor_WithCustomMessageAndInnerException_InnerExceptionSetAndMessageSetToCustom()
+        {
+            // Setup
+            const string expectedMessage = "Some exception message";
+            Exception expectedInnerException = new Exception();
+
+            // Call
+            var exception = new CannotDeleteBackupFileException(expectedMessage, expectedInnerException);
+
+            // Assert
+            Assert.IsInstanceOf<Exception>(exception);
+            Assert.AreSame(expectedInnerException, exception.InnerException);
+            Assert.AreEqual(expectedMessage, exception.Message);
+        } 
+    }
+}
\ No newline at end of file
Index: Application/Ringtoets/test/Application.Ringtoets.Storage.Test/packages.config
===================================================================
diff -u -r91f159bc90faf3c55a62ae1441e9ff2bc6fd180b -rbdc1bbd84aa923749a80dfb0cf20f5bbcb54b3fc
--- Application/Ringtoets/test/Application.Ringtoets.Storage.Test/packages.config	(.../packages.config)	(revision 91f159bc90faf3c55a62ae1441e9ff2bc6fd180b)
+++ Application/Ringtoets/test/Application.Ringtoets.Storage.Test/packages.config	(.../packages.config)	(revision bdc1bbd84aa923749a80dfb0cf20f5bbcb54b3fc)
@@ -2,6 +2,7 @@
 <packages>
   <package id="EntityFramework" version="6.1.3" targetFramework="net40" />
   <package id="Fluent.Ribbon" version="3.4.0" targetFramework="net40" />
+  <package id="log4net" version="2.0.4" targetFramework="net40" />
   <package id="NUnit" version="2.6.4" targetFramework="net40" />
   <package id="RhinoMocks" version="3.6.1" targetFramework="net40" />
   <package id="System.Data.SQLite.Core" version="1.0.99.0" targetFramework="net40" />