diff --git a/item_updater.cpp b/item_updater.cpp
new file mode 100644
index 0000000..f35a9a0
--- /dev/null
+++ b/item_updater.cpp
@@ -0,0 +1,28 @@
+#include <string>
+#include "item_updater.hpp"
+#include "config.h"
+
+namespace phosphor
+{
+namespace software
+{
+namespace updater
+{
+
+int ItemUpdater::createActivation(sd_bus_message* msg,
+                                  void* userData,
+                                  sd_bus_error* retErr)
+{
+    auto versionId = 1;
+    auto* updater = static_cast<ItemUpdater*>(userData);
+    updater->activations.insert(std::make_pair(
+            std::to_string(versionId),
+            std::make_unique<Activation>(
+                    updater->bus,
+                    SOFTWARE_OBJPATH)));
+    return 0;
+}
+
+} // namespace updater
+} // namespace software
+} // namespace phosphor