Bug 300046 ImportTypeDialog is lacking in javadoc
This seems to be a new type that was introduced when the resources work was merged into the 3.x stream. Some stuff is documented but there are other areas that aren't (such as the class itself). I don't even know what a "type" is but I'm pretty sure we're not talking about a Java type. Is this supposed to be public or internal? Please make the necessary changes and polish before the API freeze in M6.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/ide/dialogs/ImportTypeDialog.java
gridData = new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING); 
			variableCombo.setLayoutData(gridData);
			variableCombo.addSelectionListener(new SelectionListener() {
				public void widgetDefaultSelected(SelectionEvent e) {
					if (variableCombo.getSelectionIndex() == (variableCombo.getItemCount() -1))
						editVariables();
					else
						selectVariable(variableCombo.getItem(variableCombo.getSelectionIndex()));
				}
				public void widgetSelected(SelectionEvent e) {
					if (variableCombo.getSelectionIndex() == (variableCombo.getItemCount() -1))
						editVariables();
					else
						selectVariable(variableCombo.getItem(variableCombo.getSelectionIndex()));
				}
			});
			setupVariableContent();
			variableCheckbox.setSelection(variable != null);
			if (variable != null)
				selectVariable(variable);
			else
				selectVariable(preferredVariable);
		}
		
		if (linkIsOnlyChoice) {
			currentSelection = IMPORT_LINK;
			parent.getShell().setText(IDEWorkbenchMessages.ImportTypeDialog_titleFilesLinking);
		}
		alwaysPerformThisOperation = new Button(parent, SWT.CHECK);
		alwaysPerformThisOperation.setText(linkIsOnlyChoice? IDEWorkbenchMessages.ImportTypeDialog_alwaysUseLocationWhenLinkingFiles: IDEWorkbenchMessages.ImportTypeDialog_alwaysPerformThisOperation);