Index: trunk/src/org/openstreetmap/josm/gui/help/HelpContentReaderException.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/help/HelpContentReaderException.java	(revision 10102)
+++ trunk/src/org/openstreetmap/josm/gui/help/HelpContentReaderException.java	(revision 10103)
@@ -5,12 +5,17 @@
     private int responseCode;
 
-    public HelpContentReaderException(String message, Throwable cause) {
-        super(message, cause);
-    }
-
+    /**
+     * Constructs a new {@code HelpContentReaderException}.
+     * @param message the detail message. The detail message is saved for later retrieval by the {@link #getMessage()} method.
+     */
     public HelpContentReaderException(String message) {
         super(message);
     }
 
+    /**
+     * Constructs a new {@code HelpContentReaderException}.
+     * @param cause the cause (which is saved for later retrieval by the {@link #getCause()} method).
+     *        (A <tt>null</tt> value is permitted, and indicates that the cause is nonexistent or unknown.)
+     */
     public HelpContentReaderException(Throwable cause) {
         super(cause);
Index: trunk/src/org/openstreetmap/josm/gui/help/MissingHelpContentException.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/help/MissingHelpContentException.java	(revision 10102)
+++ trunk/src/org/openstreetmap/josm/gui/help/MissingHelpContentException.java	(revision 10103)
@@ -2,16 +2,16 @@
 package org.openstreetmap.josm.gui.help;
 
+/**
+ * Exception thrown when help content is missing.
+ * @since 2308
+ */
 public class MissingHelpContentException extends HelpContentReaderException {
 
-    public MissingHelpContentException(String message, Throwable cause) {
-        super(message, cause);
-    }
-
+    /**
+     * Constructs a new {@code MissingHelpContentException}.
+     * @param message the detail message. The detail message is saved for later retrieval by the {@link #getMessage()} method.
+     */
     public MissingHelpContentException(String message) {
         super(message);
     }
-
-    public MissingHelpContentException(Throwable cause) {
-        super(cause);
-    }
 }