minor ApiDoc fix

Author: marpet

beam-core/src/main/java/org/esa/beam/framework/dataio/ProductReaderPlugIn.java

@@ -18,7 +18,7 @@
 /**
  * The <code>ProductReaderPlugIn</code> interface is implemented by data product reader plug-ins.
  * <p/>
- * <p>XMLDecoder plug-ins are used to provide meta-information about a particular data format and to create instances of
+ * <p>ProductReaderPlugIn plug-ins are used to provide meta-information about a particular data format and to create instances of
  * the actual reader objects.
  * <p/>
  * <p> A plug-in can register itself in the <code>ProductIO</code> plug-in registry or it is automatically found during