the template in the providers/skel-implementation/capi directory which can be used when writing a provider using the database's C or C++ API (for example the PostgreSQL or MySQL providers)

the template in the providers/skel-implementation/models directory which can be used when writing a provider for a system which is not a relational database (or does offer a very limited API, such as for the MS Access or Berkeley DB systems).

copy one of the template's directory into a new directory named dummydb

From inside that new directory, run the providers/prepare_provider_sources.sh script with the name of the provider ("dummydb" here), the author's name and the author's email adress, which replaces all the class and object names with the name of the provider and renames the files correctly. These new sources should be compilable without any modification.

Edit the Makefile.am to add provider specific compilation and link flags

Integrate the provider's new code into a compilation unit: either Libgda's sources in the providersdirectory or in your own application (this step usually involves modifying the configure.ac or configure.in files).

Implement the missing parts (it is usually a good idea to look how other provider's implementations are done to get ideas).