diff --git a/application/symfony/src/Domain/SourceManagement/RequestedSource.php b/application/symfony/src/Domain/SourceManagement/RequestedSource.php
new file mode 100644
index 0000000..d203b58
--- /dev/null
+++ b/application/symfony/src/Domain/SourceManagement/RequestedSource.php
@@ -0,0 +1,12 @@
+<?php
+
+namespace App\Domain\SourceManagement;
+
+use App\Entity\Source\AbstractSource;
+
+/**
+ * @author kevinfrantz
+ */
+final class RequestedSource extends AbstractSource implements RequestedSourceInterface
+{
+}
diff --git a/application/symfony/src/Domain/SourceManagement/RequestedSourceInterface.php b/application/symfony/src/Domain/SourceManagement/RequestedSourceInterface.php
new file mode 100644
index 0000000..3f25c1f
--- /dev/null
+++ b/application/symfony/src/Domain/SourceManagement/RequestedSourceInterface.php
@@ -0,0 +1,12 @@
+<?php
+
+namespace App\Domain\SourceManagement;
+
+use App\Entity\Source\SourceInterface;
+
+/**
+ * @author kevinfrantz
+ */
+interface RequestedSourceInterface extends SourceInterface
+{
+}
diff --git a/application/symfony/src/Repository/Source/SourceRepository.php b/application/symfony/src/Repository/Source/SourceRepository.php
index a12b6e4..c6ae2a2 100644
--- a/application/symfony/src/Repository/Source/SourceRepository.php
+++ b/application/symfony/src/Repository/Source/SourceRepository.php
@@ -4,6 +4,7 @@ namespace App\Repository\Source;
 
 use Doctrine\ORM\EntityRepository;
 use App\Entity\Source\SourceInterface;
+use App\Domain\SourceManagement\RequestedSourceInterface;
 
 final class SourceRepository extends EntityRepository
 {
@@ -22,11 +23,11 @@ final class SourceRepository extends EntityRepository
     /**
      * Loads a source by id or if not defined, by slug.
      *
-     * @param SourceInterface $requestedSource
+     * @param RequestedSourceInterface $requestedSource
      *
      * @return SourceInterface|null
      */
-    public function findOneByIdOrSlug(SourceInterface $requestedSource): ?SourceInterface
+    public function findOneByIdOrSlug(RequestedSourceInterface $requestedSource): ?SourceInterface
     {
         try {
             return $this->find($requestedSource->getId());