diff --git a/include/EntityManager.hpp b/include/EntityManager.hpp
new file mode 100644
index 0000000..7f46ce2
--- /dev/null
+++ b/include/EntityManager.hpp
@@ -0,0 +1,38 @@
+/*
+// Copyright (c) 2018 Intel Corporation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+*/
+
+#pragma once
+
+#include <systemd/sd-journal.h>
+
+#include <iostream>
+#include <string>
+
+inline void logDeviceAdded(const std::string& device)
+{
+
+    sd_journal_send("MESSAGE=%s", "Inventory Added", "PRIORITY=%i", LOG_ERR,
+                    "REDFISH_MESSAGE_ID=%s", "OpenBMC.0.1.InventoryAdded",
+                    "REDFISH_MESSAGE_ARGS=%s", device.c_str(), NULL);
+}
+
+inline void logDeviceRemoved(const std::string& device)
+{
+
+    sd_journal_send("MESSAGE=%s", "Inventory Removed", "PRIORITY=%i", LOG_ERR,
+                    "REDFISH_MESSAGE_ID=%s", "OpenBMC.0.1.InventoryRemoved",
+                    "REDFISH_MESSAGE_ARGS=%s", device.c_str(), NULL);
+}
\ No newline at end of file
diff --git a/include/Utils.hpp b/include/Utils.hpp
index 990eb14..b4603cb 100644
--- a/include/Utils.hpp
+++ b/include/Utils.hpp
@@ -17,15 +17,26 @@
 #pragma once
 #include "filesystem.hpp"
 
+#include <boost/container/flat_map.hpp>
+#include <fstream>
+#include <iostream>
 #include <nlohmann/json.hpp>
+#include <sdbusplus/asio/connection.hpp>
 #include <sdbusplus/exception.hpp>
 
+constexpr const char* configurationOutDir = "/var/configuration/";
+constexpr const char* versionHashFile = "/var/configuration/version";
+constexpr const char* versionFile = "/etc/os-release";
+
 bool findFiles(const std::filesystem::path& dirPath,
                const std::string& matchString,
                std::vector<std::filesystem::path>& foundPaths);
 
 bool validateJson(const nlohmann::json& schemaFile,
                   const nlohmann::json& input);
+
+bool isPowerOn(void);
+void setupPowerMatch(const std::shared_ptr<sdbusplus::asio::connection>& conn);
 struct DBusInternalError final : public sdbusplus::exception_t
 {
     const char* name() const noexcept override
@@ -42,3 +53,42 @@
                "internal error";
     };
 };
+
+inline bool fwVersionIsSame(void)
+{
+    std::ifstream version(versionFile);
+    if (!version.good())
+    {
+        std::cerr << "Can't read " << versionFile << "\n";
+        return false;
+    }
+
+    std::string versionData;
+    std::string line;
+    while (std::getline(version, line))
+    {
+        versionData += line;
+    }
+
+    std::string expectedHash =
+        std::to_string(std::hash<std::string>{}(versionData));
+
+    std::filesystem::create_directory(configurationOutDir);
+    std::ifstream hashFile(versionHashFile);
+    if (hashFile.good())
+    {
+
+        std::string hashString;
+        hashFile >> hashString;
+
+        if (expectedHash == hashString)
+        {
+            return true;
+        }
+        hashFile.close();
+    }
+
+    std::ofstream output(versionHashFile);
+    output << expectedHash;
+    return false;
+}
\ No newline at end of file