Add header to house commonly used types

Change-Id: I51f0decd8c71c4442556ce4d5fcfc10bd82efa48
Signed-off-by: Deepak Kodihalli <dkodihal@in.ibm.com>
diff --git a/types.hpp b/types.hpp
new file mode 100644
index 0000000..81caad6
--- /dev/null
+++ b/types.hpp
@@ -0,0 +1,25 @@
+#pragma once
+
+#include <string>
+#include <map>
+#include <sdbusplus/server.hpp>
+
+namespace ipmi
+{
+namespace vpd
+{
+
+    using Path = std::string;
+
+    using Property = std::string;
+    using Value = sdbusplus::message::variant<bool, int64_t, std::string>;
+    using PropertyMap = std::map<Property, Value>;
+
+    using Interface = std::string;
+    using InterfaceMap = std::map<Interface, PropertyMap>;
+
+    using Object = sdbusplus::message::object_path;
+    using ObjectMap = std::map<Object, InterfaceMap>;
+
+} //namespace vpd
+} //namespace ipmi