Rule Definition
An empty catch block defeats the purpose of exceptions. When an exception occurs, nothing happens and the program fails for unknown reason. The applications can be in an unknown state that will affect subsequent processing. Since the reason of the issue (the type of the exception and potential emmbedded message) are ignored, it will require more time to fix the issue.

Remediation
The exception must be handled properly accordingly to its type in a catch block.

Violation Code Sample

TRY.
      RESULT =  1 / NUMBER.
      write: / 'Result of division:', RESULT.
      RESULT = SQRT( NUMBER ).
      write: / 'Result of square root:', RESULT.
CATCH CX_SY_ZERODIVIDE into OREF.
* This CATCH block does not contain statements
* and can be considered as not existing...
*     TEXT = OREF->GET_TEXT( ).
ENDTRY.

Fixed Code Sample

TRY.
      RESULT =  1 / NUMBER.
      write: / 'Result of division:', RESULT.
      RESULT = SQRT( NUMBER ).
      write: / 'Result of square root:', RESULT.
CATCH CX_SY_ZERODIVIDE into OREF.
      TEXT = OREF->GET_TEXT( ).
      cleanup.
      clear RESULT.
ENDTRY.

An insider's guide to writing robust, understandable, maintainable, state-of-the-art ABAP programs - Part 3 Andreas Blumenthal - Horst Keller