Bug 5765 New Class button in empty workspace should be more supportive
User feedback: "Confused how to create my first project" We should be more supportive in the UI for this special case since it is a first time experience with the UI. Therefore when the workbench is empty we should offer to create a new Java project. Minimal solution is to show an info dialog that explains that user should create a project first and offer a button to open the Java project wizard. The same is true for the new package and new interface buttons.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/ContainerPage.java
}				
				IJavaProject jproject= JavaCore.create(proj);
				fCurrRoot= jproject.getPackageFragmentRoot(res);
				if (fCurrRoot.exists()) {
					try {
						if (!proj.hasNature(JavaCore.NATURE_ID)) {
							if (resType == IResource.PROJECT) {
								status.setWarning(NewWizardMessages.getString("ContainerPage.warning.NotAJavaProject")); 
							} else {
								status.setWarning(NewWizardMessages.getString("ContainerPage.warning.NotInAJavaProject")); 
							}
							return status;
						}
					} catch (CoreException e) {
						status.setWarning(NewWizardMessages.getString("ContainerPage.warning.NotAJavaProject")); 
					}
					try {
						if (!JavaModelUtil.isOnBuildPath(jproject, fCurrRoot)) {
							status.setWarning(NewWizardMessages.getFormattedString("ContainerPage.warning.NotOnClassPath", str)); 
						}		
					} catch (JavaModelException e) {
						status.setWarning(NewWizardMessages.getFormattedString("ContainerPage.warning.NotOnClassPath", str)); 
					}					
					if (fCurrRoot.isArchive()) {
						status.setError(NewWizardMessages.getFormattedString("ContainerPage.error.ContainerIsBinary", str)); 
						return status;
					}
				}
				return status;
			} else {