--- a/gnv/src/main/java/de/intevation/gnv/artifactdatabase/objects/map/Layer.java	Mon Apr 12 10:56:55 2010 +0000
+++ b/gnv/src/main/java/de/intevation/gnv/artifactdatabase/objects/map/Layer.java	Mon Apr 12 16:45:16 2010 +0000
@@ -1,14 +1,39 @@
 package de.intevation.gnv.artifactdatabase.objects.map;
 
 /**
+ * This interface defines some basic methods providing information about a map
+ * layer.
+ * 
  * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a>
- *
  */
 public interface Layer {
 
+    /**
+     * Retrieves the name of a layer.
+     *
+     * @return the name of a layer.
+     */
     String getName();
+
+    /**
+     * Retrieves the id of a layer.
+     *
+     * @return the id of a layer.
+     */
     String getID();
+
+    /**
+     * Retrieves true, if this layer is a group layer - otherwise false.
+     *
+     * @return true, if this layer is a group layer - otherwise false.
+     */
     boolean isGroupLayer();
+
+    /**
+     * Retrieves the id of the parent layer.
+     *
+     * @return the id of the parent layer.
+     */
     String parentID();
-
 }
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
\ No newline at end of file