Insert DIV without knowing element classes

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Javascript

HTML

jQuery

Joomla

I am trying to insert a DIV on several positions in Joomla websites; not only in native articles but also in other components. The positions are:

- After title
- Below article
- Right / left of article

Since every component has its own layout and each template can use its own setup (I think) I cannot use the default JQuery functions append(), after(), etc because the classes to be used as reference can differ for each component / template.

In what way is it possible to make a generic solution that works for all (Joomla) websites?

Thanks in advance!

Cheers, Roy