Comment 41 for bug 817326

Doing a bit more code reading; it seems that the likeliest place to add an osl_syncFile - or somesuch UNO call to either the ucb/ or package/ code is the SfxMedium code:

sfx2/source/doc/docfile.cxx (Transfer_Impl)

perhaps this, or hereabouts:

                // copy the temporary storage into the disk spanned package
                GetStorage()->copyToStorage( xStor );
                uno::Reference < embed::XTransactedObject > xTrans( pImp->xStorage, uno::UNO_QUERY );
                if ( xTrans.is() )
                    xTrans->commit();

but some stepping through in the debugger is needed there I guess.