The paradigm of agents appeared while aiming to satisfy the need for new abstractions for the development of complex and distributed systems. To manage with the unpredictable behavior of open multi-agent systems, governance mechanisms are used in the regulation of interactions between agents. This is due to the concurrent and asynchronous characteristics of these systems, which are formed by several agents who can act autonomically and can interact with each other to reach individual goals. In the majority of approaches, the governance rules are specified with declarative languages or new graphical representations, which can make this task costly and can make the use of these governance mechanisms difficult. This essay presents the LawML, a modeling language based on UML for the specification of rules for interactions between agents, which is aimed to facilitate the modeling task and, therefore, to facilitate the use of a specific governance mechanism based on interaction laws. A set of transformation rules is presented in addition to the language to allow the graphical interaction law models to be transformed into the declarative language of the governance mechanism, the XMLaw format code. To allow the model-driven development of interaction laws, it is presented the LawGenerator, a tool for the automatic transformation of the law model, based on these transformation rules. Finally, this approach is applied to a case study based on a real distributed system, the Brazilian Central Bank SELIC system, with the characteristics of an open multi-agent system.