diff --git a/TestStack.Dossier/ITestDataBuilder.cs b/TestStack.Dossier/ITestDataBuilder.cs
new file mode 100644
index 0000000..4dd8591
--- /dev/null
+++ b/TestStack.Dossier/ITestDataBuilder.cs
@@ -0,0 +1,15 @@
+namespace TestStack.Dossier
+{
+    /// <summary>
+    /// Base class definining infrastructure for a class that generates objects of type {TObject}.
+    /// </summary>
+    /// <typeparam name="TObject">The type of object this class generates</typeparam>
+    public interface ITestDataBuilder<out TObject> where TObject : class
+    {
+        /// <summary>
+        /// Build the object.
+        /// </summary>
+        /// <returns>The built object</returns>
+        TObject Build();
+    }
+}
diff --git a/TestStack.Dossier/TestDataBuilder.cs b/TestStack.Dossier/TestDataBuilder.cs
index 24edb91..224f300 100644
--- a/TestStack.Dossier/TestDataBuilder.cs
+++ b/TestStack.Dossier/TestDataBuilder.cs
@@ -11,7 +11,7 @@ namespace TestStack.Dossier
     /// </summary>
     /// <typeparam name="TObject">The type of object this class generates</typeparam>
     /// <typeparam name="TBuilder">The type for this class, yes this is a recursive type definition</typeparam>
-    public abstract class TestDataBuilder<TObject, TBuilder>
+    public abstract class TestDataBuilder<TObject, TBuilder> : ITestDataBuilder<TObject>
         where TObject : class
         where TBuilder : TestDataBuilder<TObject, TBuilder>, new()
     {
diff --git a/TestStack.Dossier/TestStack.Dossier.csproj b/TestStack.Dossier/TestStack.Dossier.csproj
index 18981de..ebc247e 100644
--- a/TestStack.Dossier/TestStack.Dossier.csproj
+++ b/TestStack.Dossier/TestStack.Dossier.csproj
@@ -52,6 +52,7 @@
   <ItemGroup>
     <Compile Include="AnonymousValueFixture.cs" />
     <Compile Include="Builder.cs" />
+    <Compile Include="ITestDataBuilder.cs" />
     <Compile Include="DataSources\Dictionaries\Cache.cs" />
     <Compile Include="DataSources\Dictionaries\IDictionaryRepository.cs" />
     <Compile Include="DataSources\Dictionaries\CachedFileDictionaryRepository.cs" />