diff --git a/src/java/org/apache/commons/lang/text/ExtendedMessageFormat.java b/src/java/org/apache/commons/lang/text/ExtendedMessageFormat.java
index 4bd76dcff..1e01a0673 100644
--- a/src/java/org/apache/commons/lang/text/ExtendedMessageFormat.java
+++ b/src/java/org/apache/commons/lang/text/ExtendedMessageFormat.java
@@ -84,7 +84,7 @@ public class ExtendedMessageFormat extends MessageFormat {
     /**
      * Create a new ExtendedMessageFormat for the default locale.
      * 
-     * @param pattern String
+     * @param pattern  the pattern to use, not null
      * @throws IllegalArgumentException in case of a bad pattern.
      */
     public ExtendedMessageFormat(String pattern) {
@@ -94,8 +94,8 @@ public ExtendedMessageFormat(String pattern) {
     /**
      * Create a new ExtendedMessageFormat.
      * 
-     * @param pattern String
-     * @param locale Locale
+     * @param pattern  the pattern to use, not null
+     * @param locale  the locale to use, not null
      * @throws IllegalArgumentException in case of a bad pattern.
      */
     public ExtendedMessageFormat(String pattern, Locale locale) {
@@ -105,8 +105,8 @@ public ExtendedMessageFormat(String pattern, Locale locale) {
     /**
      * Create a new ExtendedMessageFormat for the default locale.
      * 
-     * @param pattern String
-     * @param registry Registry of format factories:  Map<String, ? extends FormatFactory>
+     * @param pattern  the pattern to use, not null
+     * @param registry  the registry of format factories, may be null
      * @throws IllegalArgumentException in case of a bad pattern.
      */
     public ExtendedMessageFormat(String pattern, Map<String, ? extends FormatFactory> registry) {
@@ -116,9 +116,9 @@ public ExtendedMessageFormat(String pattern, Map<String, ? extends FormatFactory
     /**
      * Create a new ExtendedMessageFormat.
      * 
-     * @param pattern String
-     * @param locale Locale
-     * @param registry Registry of format factories:  Map<String, ? extends FormatFactory>
+     * @param pattern  the pattern to use, not null
+     * @param locale  the locale to use, not null
+     * @param registry  the registry of format factories, may be null
      * @throws IllegalArgumentException in case of a bad pattern.
      */
     public ExtendedMessageFormat(String pattern, Locale locale, Map<String, ? extends FormatFactory> registry) {