Evaluation required for Class diagram for Sample Java ETL functionality

I would like to get my class diagram evaluated for a sample java application I have written for Extract-Transform-Load (ETL) functionality. I wanted to know whether this class design I have come up with is a good enough design considering SOLID design principles, is it modular enough?

I do understand that there could be many other ways to design a specific requirements so please restrict your answers to the evaluation and any improvements you could suggest.