Added common and test directories

common/service_locator.hpp

@@ -0,0 +1,21 @@
+#ifndef SERVICELOCATOR_HPP_
+#define SERVICELOCATOR_HPP_
+
+template<typename T>
+class ServiceLocator {
+public:
+	static T* Set(T* t) {
+		delete service;
+		return service = t;
+	}
+	static T* Get() {
+		return service;
+	}
+private:
+	static T* service;
+};
+
+template<typename T>
+T* ServiceLocator<T>::service = nullptr;
+
+#endif