updating code from Flying Laptop

This is the framework of Flying Laptop OBSW version A.13.0.

timemanager/TimeStamperIF.h

@@ -1,17 +1,19 @@
-/*
- * TimeStamperIF.h
- *
- *  Created on: 31.03.2015
- *      Author: baetz
- */
-
 #ifndef FRAMEWORK_TIMEMANAGER_TIMESTAMPERIF_H_
 #define FRAMEWORK_TIMEMANAGER_TIMESTAMPERIF_H_
 
 #include <framework/returnvalues/HasReturnvaluesIF.h>
 
+/**
+ * A class implementing this IF provides facilities to add a time stamp to the
+ * buffer provided.
+ * Implementors need to ensure that calling the method is thread-safe, i.e.
+ * addTimeStamp may be called in parallel from a different context.
+ */
 class TimeStamperIF {
 public:
+	static const uint8_t INTERFACE_ID = CLASS_ID::TIME_STAMPER_IF;
+	static const ReturnValue_t BAD_TIMESTAMP = MAKE_RETURN_CODE(1);
+
 	static const uint8_t MISSION_TIMESTAMP_SIZE = 8; //!< This is a mission-specific constant and determines the total size reserved for timestamps.
 	virtual ReturnValue_t addTimeStamp(uint8_t* buffer, const uint8_t maxSize) = 0;
 	virtual ~TimeStamperIF() {}