Comment from Michael Stahl in Gerrit:
"to prevent potential disasters if somebody adds
a sub-class and overrides ImplCommit,
which is then not called here."

Change-Id: I2d991c713734fd516827a5dd6c8929aa64e59409
Reviewed-on: https://gerrit.libreoffice.org/26278Reviewed-by: Michael Stahl <mstahl@redhat.com>
Tested-by: Michael Stahl <mstahl@redhat.com>