Although the OpenEngSB is distributed as a binary ZIP it is basically not meant to be used that way. Instead you typically start developing your own project using the OpenEngSB as a base environment and Maven to assembly your code with the OpenEngSB.
To use the same dependencies as the OPENENGSB project you have to import the openengsb-bundle-settings project into your dependency management section:
<dependencyManagement> <dependencies> <dependency> <groupId>org.openengsb.build</groupId> <artifactId>openengsb-bundle-settings</artifactId> <version>Version of OPENENGSB you use</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement>
This will import all the dependencies with the correct versions into the dependencyManagement section. You can now define the dependencies shared between your project and OPENENGSB in your dependencies section without setting the version.