Every class definition should be commented to explain its goal and how it works. This comment must be located before [or after] the class
definition.
Noncompliant code example
CLASS my_class DEFINITION.
...
ENDCLASS
Compliant solution
* here is
* my comment
CLASS my_class DEFINITION.
...
ENDCLASS
Exceptions
CLASS my_class IMPLEMENTATION. //Only class DEFINITIONs are checked by this rule
...
ENDCLASS
