Index: Core/Common/src/Core.Common.Gui/Settings/SettingsHelper.cs
===================================================================
diff -u -rd74518566abeb501ea88b25f3111f9749853c5ed -rf3e15928caffd4336c97f5fa3de495a5a05bf6b8
--- Core/Common/src/Core.Common.Gui/Settings/SettingsHelper.cs	(.../SettingsHelper.cs)	(revision d74518566abeb501ea88b25f3111f9749853c5ed)
+++ Core/Common/src/Core.Common.Gui/Settings/SettingsHelper.cs	(.../SettingsHelper.cs)	(revision f3e15928caffd4336c97f5fa3de495a5a05bf6b8)
@@ -30,10 +30,10 @@
     /// <summary>
     /// Class that defines helper methods related to user settings.
     /// </summary>
-    public class SettingsHelper
+    public class SettingsHelper : ISettingsHelper
     {
         private readonly string localSettingsDirectoryPath = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
-        private static SettingsHelper instance;
+        private static ISettingsHelper instance;
 
         /// <summary>
         /// Creates a new instance of <see cref="SettingsHelper"/>.
@@ -49,7 +49,7 @@
         /// <summary>
         /// Gets the singleton instance of <see cref="SettingsHelper"/>.
         /// </summary>
-        public static SettingsHelper Instance
+        public static ISettingsHelper Instance
         {
             get
             {
Index: Core/Common/test/Core.Common.Gui.Test/Core.Common.Gui.Test.csproj
===================================================================
diff -u -r45440093089496f59ed420e772136756c229e30b -rf3e15928caffd4336c97f5fa3de495a5a05bf6b8
--- Core/Common/test/Core.Common.Gui.Test/Core.Common.Gui.Test.csproj	(.../Core.Common.Gui.Test.csproj)	(revision 45440093089496f59ed420e772136756c229e30b)
+++ Core/Common/test/Core.Common.Gui.Test/Core.Common.Gui.Test.csproj	(.../Core.Common.Gui.Test.csproj)	(revision f3e15928caffd4336c97f5fa3de495a5a05bf6b8)
@@ -163,6 +163,10 @@
       <Project>{f49bd8b2-332a-4c91-a196-8cce0a2c7d98}</Project>
       <Name>Core.Common.Utils</Name>
     </ProjectReference>
+    <ProjectReference Include="..\Core.Common.Gui.TestUtil\Core.Common.Gui.TestUtil.csproj">
+      <Project>{26214BD0-DAFB-4CFC-8EB2-80C5D53C859E}</Project>
+      <Name>Core.Common.Gui.TestUtil</Name>
+    </ProjectReference>
     <ProjectReference Include="..\Core.Common.TestUtil\Core.Common.TestUtil.csproj">
       <Project>{D749EE4C-CE50-4C17-BF01-9A953028C126}</Project>
       <Name>Core.Common.TestUtil</Name>
Index: Core/Common/test/Core.Common.Gui.Test/Settings/SettingsHelperTest.cs
===================================================================
diff -u -r50962d0d185e4e52a634dd932590c02960ccf2b1 -rf3e15928caffd4336c97f5fa3de495a5a05bf6b8
--- Core/Common/test/Core.Common.Gui.Test/Settings/SettingsHelperTest.cs	(.../SettingsHelperTest.cs)	(revision 50962d0d185e4e52a634dd932590c02960ccf2b1)
+++ Core/Common/test/Core.Common.Gui.Test/Settings/SettingsHelperTest.cs	(.../SettingsHelperTest.cs)	(revision f3e15928caffd4336c97f5fa3de495a5a05bf6b8)
@@ -31,6 +31,18 @@
     public class SettingsHelperTest
     {
         [Test]
+        public void Instance_CalledTwice_ReturnsSameInstance()
+        {
+            // Setup
+            ISettingsHelper expected = SettingsHelper.Instance;
+
+            // Call
+            ISettingsHelper actual = SettingsHelper.Instance;
+
+            // Assert
+            Assert.AreSame(expected, actual);
+        }
+        [Test]
         public void ApplicationName_ReturnsProductNameOfExecutingAssembly()
         {
             // Call
Index: Core/Common/test/Core.Common.Gui.TestUtil.Test/Core.Common.Gui.TestUtil.Test.csproj
===================================================================
diff -u -r6a5d7b40b7ba4dcb73e393075338352d194e97c2 -rf3e15928caffd4336c97f5fa3de495a5a05bf6b8
--- Core/Common/test/Core.Common.Gui.TestUtil.Test/Core.Common.Gui.TestUtil.Test.csproj	(.../Core.Common.Gui.TestUtil.Test.csproj)	(revision 6a5d7b40b7ba4dcb73e393075338352d194e97c2)
+++ Core/Common/test/Core.Common.Gui.TestUtil.Test/Core.Common.Gui.TestUtil.Test.csproj	(.../Core.Common.Gui.TestUtil.Test.csproj)	(revision f3e15928caffd4336c97f5fa3de495a5a05bf6b8)
@@ -52,6 +52,7 @@
     <Compile Include="Properties\AssemblyInfo.cs">
       <SubType>Code</SubType>
     </Compile>
+    <Compile Include="Settings\TestSettingsHelperTest.cs" />
   </ItemGroup>
   <ItemGroup>
     <None Include="..\..\..\..\build\Copying.Lesser.licenseheader">
Index: Core/Common/test/Core.Common.Gui.TestUtil.Test/Settings/TestSettingsHelperTest.cs
===================================================================
diff -u
--- Core/Common/test/Core.Common.Gui.TestUtil.Test/Settings/TestSettingsHelperTest.cs	(revision 0)
+++ Core/Common/test/Core.Common.Gui.TestUtil.Test/Settings/TestSettingsHelperTest.cs	(revision f3e15928caffd4336c97f5fa3de495a5a05bf6b8)
@@ -0,0 +1,148 @@
+// 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 Lesser 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 Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser 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.IO;
+using Core.Common.Gui.Settings;
+using Core.Common.Gui.TestUtil.Settings;
+using Core.Common.TestUtil;
+using NUnit.Framework;
+
+namespace Core.Common.Gui.TestUtil.Test.Settings
+{
+    [TestFixture]
+    public class TestSettingsHelperTest
+    {
+        [Test]
+        public void Constructor_ExpectedProperties()
+        {
+            // Call
+            var settingsHelper = new TestSettingsHelper();
+
+            // Assert
+            Assert.IsInstanceOf<ISettingsHelper>(settingsHelper);
+            Assert.IsEmpty(settingsHelper.ApplicationName);
+            Assert.IsEmpty(settingsHelper.ApplicationVersion);
+        }
+
+        [Test]
+        public void GetApplicationLocalUserSettingsDirectory_NullPostfix_ReturnsRootFolder()
+        {
+            // Setup
+            var settingsHelper = new TestSettingsHelper();
+
+            // Call
+            string directory = settingsHelper.GetApplicationLocalUserSettingsDirectory(null);
+
+            // Assert
+            string testDataPath = TestHelper.GetTestDataPath(TestDataPath.Core.Common.Gui.Path);
+            Assert.AreEqual(testDataPath, directory);
+        }
+
+        [Test]
+        public void GetApplicationLocalUserSettingsDirectoryWithExpectedDirectory_NullPostfix_ReturnsRootFolder()
+        {
+            // Setup
+            const string userSettingsDirectory = "someFolder";
+            var settingsHelper = new TestSettingsHelper
+            {
+                ExpectedApplicationLocalUserSettingsDirectory = userSettingsDirectory
+            };
+
+            // Call
+            string directory = settingsHelper.GetApplicationLocalUserSettingsDirectory(null);
+
+            // Assert
+            Assert.AreEqual(userSettingsDirectory, directory);
+        }
+
+        [Test]
+        public void GetApplicationLocalUserSettingsDirectory_WithPostfix_ReturnsRootFolderWithPostfix()
+        {
+            // Setup
+            var settingsHelper = new TestSettingsHelper();
+            string postfix = Path.GetRandomFileName();
+
+            // Call
+            string directory = settingsHelper.GetApplicationLocalUserSettingsDirectory(postfix);
+
+            // Assert
+            string testDataPath = TestHelper.GetTestDataPath(TestDataPath.Core.Common.Gui.Path, postfix);
+            Assert.AreEqual(testDataPath, directory);
+            Assert.IsTrue(Directory.Exists(testDataPath));
+            Directory.Delete(testDataPath);
+        }
+
+        [Test]
+        public void GetApplicationLocalUserSettingsDirectoryWithExpectedDirectory_WithPostfix_ReturnsRootFolderWithPostfix()
+        {
+            // Setup
+            string postfix = Path.GetRandomFileName();
+            const string userSettingsDirectory = "someFolder";
+            var settingsHelper = new TestSettingsHelper
+            {
+                ExpectedApplicationLocalUserSettingsDirectory = userSettingsDirectory
+            };
+
+            // Call
+            string directory = settingsHelper.GetApplicationLocalUserSettingsDirectory(postfix);
+
+            // Assert
+            string testDataPath = Path.Combine(userSettingsDirectory, postfix);
+            Assert.AreEqual(testDataPath, directory);
+            Assert.IsTrue(Directory.Exists(testDataPath));
+            Directory.Delete(testDataPath);
+        }
+
+        [Test]
+        public void ApplicationName_WithExpectedSet_ReturnsExpected()
+        {
+            // Setup
+            const string expectedApplicationName = "some name";
+            var settingsHelper = new TestSettingsHelper
+            {
+                ExpectedApplicationName = expectedApplicationName
+            };
+
+            // Call
+            string applicationName = settingsHelper.ApplicationName;
+
+            // Assert
+            Assert.AreEqual(expectedApplicationName, applicationName);
+        }
+
+        [Test]
+        public void ApplicationVersion_WithExpectedSet_ReturnsExpected()
+        {
+            // Setup
+            const string expectedApplicationVersion = "some version";
+            var settingsHelper = new TestSettingsHelper
+            {
+                ExpectedApplicationVersion = expectedApplicationVersion
+            };
+
+            // Call
+            string applicationVersion = settingsHelper.ApplicationVersion;
+
+            // Assert
+            Assert.AreEqual(expectedApplicationVersion, applicationVersion);
+        }
+    }
+}
\ No newline at end of file
Index: Core/Common/test/Core.Common.Gui.TestUtil/Core.Common.Gui.TestUtil.csproj
===================================================================
diff -u -r6a5d7b40b7ba4dcb73e393075338352d194e97c2 -rf3e15928caffd4336c97f5fa3de495a5a05bf6b8
--- Core/Common/test/Core.Common.Gui.TestUtil/Core.Common.Gui.TestUtil.csproj	(.../Core.Common.Gui.TestUtil.csproj)	(revision 6a5d7b40b7ba4dcb73e393075338352d194e97c2)
+++ Core/Common/test/Core.Common.Gui.TestUtil/Core.Common.Gui.TestUtil.csproj	(.../Core.Common.Gui.TestUtil.csproj)	(revision f3e15928caffd4336c97f5fa3de495a5a05bf6b8)
@@ -87,12 +87,17 @@
     <Compile Include="ContextMenu\CustomItemsOnlyContextMenuBuilder.cs" />
     <Compile Include="PluginTestHelper.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="Settings\TestSettingsHelper.cs" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\..\src\Core.Common.Gui\Core.Common.Gui.csproj">
       <Project>{30E4C2AE-719E-4D70-9FA9-668A9767FBFA}</Project>
       <Name>Core.Common.Gui</Name>
     </ProjectReference>
+    <ProjectReference Include="..\Core.Common.TestUtil\Core.Common.TestUtil.csproj">
+      <Project>{D749EE4C-CE50-4C17-BF01-9A953028C126}</Project>
+      <Name>Core.Common.TestUtil</Name>
+    </ProjectReference>
   </ItemGroup>
   <ItemGroup>
     <Reference Include="nunit.framework, Version=3.6.0.0, Culture=neutral, PublicKeyToken=2638cd05610744eb, processorArchitecture=MSIL">
Index: Core/Common/test/Core.Common.Gui.TestUtil/Settings/TestSettingsHelper.cs
===================================================================
diff -u
--- Core/Common/test/Core.Common.Gui.TestUtil/Settings/TestSettingsHelper.cs	(revision 0)
+++ Core/Common/test/Core.Common.Gui.TestUtil/Settings/TestSettingsHelper.cs	(revision f3e15928caffd4336c97f5fa3de495a5a05bf6b8)
@@ -0,0 +1,98 @@
+// 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 Lesser 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 Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser 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 System.IO;
+using Core.Common.Gui.Settings;
+using Core.Common.TestUtil;
+
+namespace Core.Common.Gui.TestUtil.Settings
+{
+    /// <summary>
+    /// A <see cref="TestSettingsHelper"/> implementation suitable for unit testing purposes.
+    /// </summary>
+    public class TestSettingsHelper : ISettingsHelper
+    {
+        /// <summary>
+        /// Creates a new instance of <see cref="TestSettingsHelper"/>.
+        /// </summary>
+        public TestSettingsHelper()
+        {
+            ExpectedApplicationLocalUserSettingsDirectory = TestHelper.GetTestDataPath(TestDataPath.Core.Common.Gui.Path);
+            ApplicationName = string.Empty;
+            ApplicationVersion = string.Empty;
+        }
+
+        /// <summary>
+        /// Sets the <see cref="ApplicationName"/>.
+        /// </summary>
+        public string ExpectedApplicationName
+        {
+            set
+            {
+                ApplicationName = value;
+            }
+        }
+
+        /// <summary>
+        /// Sets the <see cref="ApplicationVersion"/>.
+        /// </summary>
+        public string ExpectedApplicationVersion
+        {
+            set
+            {
+                ApplicationVersion = value;
+            }
+        }
+
+        /// <summary>
+        /// Gets or sets the directory to use in <see cref="GetApplicationLocalUserSettingsDirectory"/>.
+        /// </summary>
+        public string ExpectedApplicationLocalUserSettingsDirectory { private get; set; }
+
+        public string ApplicationName { get; private set; }
+
+        public string ApplicationVersion { get; private set; }
+
+        public string GetApplicationLocalUserSettingsDirectory(string postfix)
+        {
+            var settingsDirectoryPath = string.IsNullOrWhiteSpace(postfix)
+                                            ? ExpectedApplicationLocalUserSettingsDirectory
+                                            : Path.Combine(ExpectedApplicationLocalUserSettingsDirectory, postfix);
+
+            if (Directory.Exists(settingsDirectoryPath))
+            {
+                return settingsDirectoryPath;
+            }
+
+            try
+            {
+                Directory.CreateDirectory(settingsDirectoryPath);
+            }
+            catch (Exception e)
+            {
+                var message = $"Unable to create '{settingsDirectoryPath}'";
+                throw new IOException(message, e);
+            }
+            return settingsDirectoryPath;
+        }
+    }
+}
\ No newline at end of file