added some documentation

src/fsfw/cfdp/handler/FaultHandlerBase.h

@@ -7,6 +7,27 @@
 
 namespace cfdp {
 
+/**
+ * @brief Provides a way to implement the fault handling procedures as specified
+ * in chapter 4.8 of the CFDP standard.
+ *
+ * @details
+ * It is passed into the CFDP handlers as part of the local entity configuration and provides
+ * a way to specify custom user error handlers.
+ *
+ * It does so by mapping each applicable CFDP condition code to a fault handler which
+ * is denoted by the four @cfdp::FaultHandlerCodes. This code is used to dispatch
+ * to a user-provided callback function:
+ *
+ * 1. @FaultHandlerCodes::IGNORE_ERROR -> @ignore_cb
+ * 2. @FaultHandlerCodes::NOTICE_OF_CANCELLATION` -> @notice_of_cancellation_cb
+ * 3. @FaultHandlerCodes::NOTICE_OF_SUSPENSION` -> @notice_of_suspension_cb
+ * 4. @FaultHandlerCodes::ABANDON_TRANSACTION` -> @abandon_transaction_cb
+ *
+ * For each error reported by @reportError, the appropriate fault handler callback
+ * will be called. The user provides the callbacks by providing a custom class which implements
+ * these base class and all abstract fault handler callbacks.
+ */
 class FaultHandlerBase {
  public:
   virtual ~FaultHandlerBase();

src/fsfw/cfdp/handler/UserBase.h

@@ -8,9 +8,16 @@ namespace cfdp {
 class UserBase {
  public:
   /**
-   * Create a user base class which is used to provides a user interface to interact with CFDP
-   * handlers. It is also used to pass the Virtual Filestore (VFS) Implementation to the CFDP
+   * @brief Base class which provides a user interface to interact with CFDP handlers.
+   *
+   * @details
+   * This class is also used to pass the Virtual Filestore (VFS) Implementation to the CFDP
    * handlers so the filestore operations can be mapped to the underlying filestore.
+   *
+   * It is used by implementing it in a child class and then passing it to the CFDP
+   * handler objects. The base class provides default implementation for the user indication
+   * primitives specified in the CFDP standard. The user can override these implementations
+   * to provide custom indication handlers.
    * @param vfs Virtual Filestore Object. Will be used for all file operations
    */
   explicit UserBase(HasFileSystemIF& vfs);