diff --git a/docs/contributors.html b/docs/contributors.html
index aa76a8e1a..ee56055a6 100644
--- a/docs/contributors.html
+++ b/docs/contributors.html
@@ -331,8 +331,13 @@ is called <a href="http://www.antbuild.com">antbuild</a>.
 
             </p>
                                 <p>
-                <b>Jan Matèrne</b>
+                <b>Jan Matèrne</b> (jhm at apache.org)
 <br />
+Jan is consultant for OOA/D in the computer centre of the government
+of Northrhine Westfalia / Germany. He is the co-author of
+<a href="http://www.galileocomputing.de/katalog/buecher/titel/gp/titelID-341?">
+Rational Rose und UML im Praxiseinsatz</a> the first German book about
+that OOAD-tool.
             </p>
                                 <p>
                 <b>Adam Murdoch</b>
diff --git a/xdocs/contributors.xml b/xdocs/contributors.xml
index 3fb96eded..1cc8be020 100644
--- a/xdocs/contributors.xml
+++ b/xdocs/contributors.xml
@@ -189,8 +189,13 @@ is called <a href="http://www.antbuild.com">antbuild</a>.
             </p>
 
             <p>
-                <b>Jan Matèrne</b>
+                <b>Jan Matèrne</b> (jhm at apache.org)
 <br/>
+Jan is consultant for OOA/D in the computer centre of the government
+of Northrhine Westfalia / Germany. He is the co-author of
+<a href="http://www.galileocomputing.de/katalog/buecher/titel/gp/titelID-341?">
+Rational Rose und UML im Praxiseinsatz</a> the first German book about
+that OOAD-tool.
             </p>
             <p>
                 <b>Adam Murdoch</b>