Bug 28398 New Java Project Wizard: no source folder after using "Back"
Build 20021213 1. Start the new Java Project wizard 2. Enter "JUnix" 3. Press "Next" - see: there's a source folder 4. Press "Back" 5. Change project name to "JUnit" 6. Press "Next" ==> no source folder
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/buildpaths/SourceContainerWorkbookPage.java
if (fFoldersList.getIndexOfElement(elem) != -1) {
			editElementEntry((CPListElement) elem);
		} else if (elem instanceof CPListElementAttribute) {
			editAttributeEntry((CPListElementAttribute) elem);
		}
	}
	private void editElementEntry(CPListElement elem) {
		CPListElement res= null;
		
		IResource resource= elem.getResource();
		if (resource.exists()) {
			CPListElement[] arr= openSourceContainerDialog(elem);
			if (arr != null) {
				res= arr[0];
			}
		} else {
			res= openNewSourceContainerDialog(elem);
		}
		
		if (res != null) {
			fFoldersList.replaceElement(elem, res);
		}
	}
	private void editAttributeEntry(CPListElementAttribute elem) {
		String key= elem.getKey();
		if (key.equals(CPListElement.OUTPUT)) {
			CPListElement selElement= (CPListElement) elem.getParent();
			OutputLocationDialog dialog= new OutputLocationDialog(getShell(), selElement);
			if (dialog.open() == OutputLocationDialog.OK) {
				selElement.setAttribute(CPListElement.OUTPUT, dialog.getOutputLocation());