This study aims to develop a method that enables the automatic transformation of class models created in the Unified Modeling Language (UML) into a functional open source database, adapted to the needs of the end user. Manually transforming a UML class model in a database is often a time-consuming and laborious process that is prone to human error. Our framework solves this problem by generating a database schema from a UML class model that is in standard XMI format. This automated approach not only speeds up the process, but also reduces the possibility of errors in the transformation. A tool that we developed additional tables, attributes and links from the UML model, using information about classes, properties and relationships within the model class. In addition, the tool includes an abstract RESTful web service component, which adds a web interface to the generated database. This allows for easier access and manipulation of data via the web. It is useful to note that such a tool will be of great help to software engineers who are at the beginning of their careers, as well as to students who are just getting acquainted with UML models and databases. To test the effectiveness and reliability of our framework, we implemented it in the Baserow end-user database and evaluated its effectiveness through a use case related to student practice. For those interested in further research or application of our tool, the supporting code is publicly available as an open source GitHub repository. This allows the community to contribute to the further development and optimization of this tool.