The files SNMP4JTestAgent.cfg and SNMP4JTestAgentBC.cfg are create by the agent to store persistent data:

• SNMP4JTestAgentBC.cfg is created/written at agent startup to store the SNMPv3 boot counter.
• SNMP4JTestAgent.cfg is created/written when the agent is shutdown by SIGTERM (Ctrl-<C>) or its configuration is saved through the SNMP4J-CONFIG-MIB.

By default, the config files are stored in the working directory of the agent.