Bug 219901 [Undo] new file creation subjec to Undo (file deleted without warning)
when creating a new file by right clicking on your project in the project explorer new->file this action is put on the undo/redo stack. Pressing Ctrl-Z to undo this action will thus delete your file. As this stack is separate from the stack in the editor , one can create a new file, work for a long time, then inadvertently press ctrl-z to undo a code change while having the focus on the project explorer and irrevocably lose their file. Redo will create a new EMPTY file; the work is gone, forever. This appears to only work for the "new file", not for "new->source file" etc. Although some may perceive this as a feature, it is hard to imagine a scenario where ctrl-z should permanently delete a file without warning.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/wizards/newresource/BasicNewProjectResourceWizard.java
} catch (InterruptedException e) {
			return null;
		} catch (InvocationTargetException e) {
			Throwable t = e.getTargetException();
			if (t instanceof ExecutionException
					&& t.getCause() instanceof CoreException) {
				CoreException cause = (CoreException) t.getCause();
				StatusAdapter status;
				if (cause.getStatus().getCode() == IResourceStatus.CASE_VARIANT_EXISTS) {
					status = new StatusAdapter(
							StatusUtil
									.newStatus(
											IStatus.WARNING,
											NLS
													.bind(
															ResourceMessages.NewProject_caseVariantExistsError,
															newProjectHandle
																	.getName()),
											cause));
				} else {
					status = new StatusAdapter(StatusUtil.newStatus(cause
							.getStatus().getSeverity(),
							ResourceMessages.NewProject_errorMessage, cause));
				}
				status.setProperty(StatusAdapter.TITLE_PROPERTY,
						ResourceMessages.NewProject_errorMessage);
				StatusManager.getManager().handle(status, StatusManager.BLOCK);
			} else {
				StatusAdapter status = new StatusAdapter(new Status(
						IStatus.WARNING, IDEWorkbenchPlugin.IDE_WORKBENCH, 0,