At work we have an entity library which is used by several clients for the library (several servlets, a desktop application, etc.). The entity library consists of JPA-Annota
In the maven pom.xml file you have to add the resource directory, so you don't have to add it to the build-path in eclipse manually.
... ... src/resources ... ...
see: http://maven.apache.org/plugins/maven-resources-plugin/examples/resource-directory.html