diff -r 000000000000 -r 0678c9589013 samples/trycatchredo/src/org/apidesign/exceptions/trycatchredo/api/UserQuestionException.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/samples/trycatchredo/src/org/apidesign/exceptions/trycatchredo/api/UserQuestionException.java	Sun Feb 01 16:29:46 2009 +0100
@@ -0,0 +1,29 @@
+package org.apidesign.exceptions.trycatchredo.api;
+
+import java.io.IOException;
+import javax.swing.JOptionPane;
+
+/** Specialized I/O exception to request some kind of user confirmation.
+ * A code that needs to ask user shall not attempt to open a dialog itself,
+ * rather it shall emit this exception and let its callers show the dialog
+ * at appropriate time.
+ *
+ * @author Jaroslav Tulach
+ * @since 2.0
+ */
+public abstract class UserQuestionException extends IOException {
+    /** Description of the dialog to show to the user. Whoever catches
+     * this exception shall use {@link #getQuestionPane()}.{@link JOptionPane#createDialog(java.lang.String)}
+     * to construct and display the dialog.
+     * 
+     * @return the pane to display to user
+     */
+    public abstract JOptionPane getQuestionPane();
+    /** When the user confirms (or rejects) message presented by the
+     * {@link #getQuestionPane()} dialog, the exception shall be notified
+     * by calling this method with {@link JOptionPane#getValue()} option.
+     *
+     * @param option the option selected by the user
+     */
+    public abstract void confirm(Object option);
+}