I have a Maven project and it has 2 mains (MyTestApp_A, and MyTestApp_B) inside one of the packages from the src folder.
I can run these \"main\" classes in Eclipse
Try using executions for each main class you want to execute:
org.codehaus.mojo exec-maven-plugin 1.2.1 MyTestApp_A java servers.MyTestApp_A false MyTestApp_B java servers.MyTestApp_B false