all retval replacements

bsp_q7s/memory/FilesystemHelper.h

@@ -4,14 +4,14 @@
 #include <string>
 
 #include "commonClassIds.h"
-#include "fsfw/returnvalues/HasReturnvaluesIF.h"
+#include "fsfw/returnvalues/returnvalue.h"
 
 /**
  * @brief   This class implements often used functions related to the file system management.
  *
  * @author  J. Meier
  */
-class FilesystemHelper : public HasReturnvaluesIF {
+class FilesystemHelper {
  public:
   static const uint8_t INTERFACE_ID = CLASS_ID::FILE_SYSTEM_HELPER;
 
@@ -26,7 +26,7 @@ class FilesystemHelper : public HasReturnvaluesIF {
    *
    * @param path  Path to check
    *
-   * @return  RETURN_OK if path points to SD card and the appropriate SD card is mounted or if
+   * @return  returnvalue::OK if path points to SD card and the appropriate SD card is mounted or if
    *          path does not point to SD card.
    *          Return error code if path points to SD card and the corresponding SD card is not
    *          mounted.
@@ -38,7 +38,7 @@ class FilesystemHelper : public HasReturnvaluesIF {
    *
    * @param file   File to check
    *
-   * @return  RETURN_OK if file exists, otherwise return error code.
+   * @return  returnvalue::OK if file exists, otherwise return error code.
    */
   static ReturnValue_t fileExists(std::string file);