Bug 134740 [Wizards] PDE product wizard is not obvious to use.
see attached image. The wizard for creating a new product opens with a file name initialized to ".product" which is selected. Generally this would imply that this is a good default but if you start typing you will replace the text with something else that is also a good name. If you require an extension for a file you should add it yourself like the "Export Archive" wizard.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/misc/ResourceAndContainerGroup.java
public static final int PROBLEM_NONE = 0;
    public static final int PROBLEM_RESOURCE_EMPTY = 1;
    public static final int PROBLEM_RESOURCE_EXIST = 2;
    public static final int PROBLEM_PATH_INVALID = 4;
    public static final int PROBLEM_CONTAINER_EMPTY = 5;
    public static final int PROBLEM_PROJECT_DOES_NOT_EXIST = 6;
    public static final int PROBLEM_NAME_INVALID = 7;
    public static final int PROBLEM_PATH_OCCUPIED = 8;
    
    private Listener client;
    
    private boolean allowExistingResources = false;
    
    private String resourceType = IDEWorkbenchMessages.ResourceGroup_resource;
    
    private boolean showClosedProjects = true;
    
    private String problemMessage = "";
    private int problemType = PROBLEM_NONE;
    
    private ContainerSelectionGroup containerGroup;
    private Text resourceNameField;
    
    private static final int SIZING_TEXT_FIELD_WIDTH = 250;
    /**