You can create a public method called class_constructor with an empty implementation.
Example
Here, the class_constructor method is added:
CLASS cl_car_constructor_generator DEFINITION PUBLIC CREATE PUBLIC . PUBLIC SECTION. ENDCLASS. CLASS cl_car_constructor_generator IMPLEMENTATION. ENDCLASS.
In the definition, the class_constructor method is declared as CLASS-METHODS.
In the implementation, the empty body of the class_constructor method is added.
Example
ABAP class after generating
CLASS cl_car_constructor_generator DEFINITION PUBLIC CREATE PUBLIC . PUBLIC SECTION. CLASS-METHODS class_constructor. ENDCLASS. CLASS cl_car_constructor_generator IMPLEMENTATION. METHOD class_constructor. ENDMETHOD. ENDCLASS.