multymodule-3-1.0 NO_M2ECLIPSE_SUPPORT: Project files created with the maven-eclipse-plugin are not supported in M2Eclipse. multymodule-2-1.0 org.eclipse.wst.common.project.facet.core.builder org.eclipse.wst.validation.validationbuilder org.eclipse.wst.common.project.facet.core.nature org.eclipse.wst.common.modulecore.ModuleCoreNature