Okay, then the .classpath files in both projects need updating, because they expect the source to be in the src/ folder.
Package 'org.eclipse.papyrus.infra.viewpoints.configuration.presentation' does not exist in this plug-in MANIFEST.MF /org.eclipse.papyrus.infra.viewpoints.configuration.editor/META-INF line 12
Package 'org.eclipse.papyrus.infra.viewpoints.configuration.provider' does not exist in this plug-in MANIFEST.MF /org.eclipse.papyrus.infra.viewpoints.configuration.edit/META-INF line 11
Project 'org.eclipse.papyrus.infra.viewpoints.configuration.edit' is missing required source folder: 'src' org.eclipse.papyrus.infra.viewpoints.configuration.edit Build path
Project 'org.eclipse.papyrus.infra.viewpoints.configuration.editor' is missing required source folder: 'src' org.eclipse.papyrus.infra.viewpoints.configuration.editor Build path
The constructor Exception(String, Throwable, boolean, boolean) is undefined TestUtilsException.java /org.eclipse.papyrus.uml.profile.drafter.tests/src/org/eclipse/papyrus/uml/profile/drafter/tests/exception line 79
The project cannot be built until build path errors are resolved org.eclipse.papyrus.infra.viewpoints.configuration.edit Unknown
The project cannot be built until build path errors are resolved org.eclipse.papyrus.infra.viewpoints.configuration.editor Unknown