Index: trunk/src/org/openstreetmap/josm/data/projection/CustomProjection.java
===================================================================
--- trunk/src/org/openstreetmap/josm/data/projection/CustomProjection.java	(revision 7370)
+++ trunk/src/org/openstreetmap/josm/data/projection/CustomProjection.java	(revision 7371)
@@ -97,7 +97,10 @@
         bounds("bounds", true);
 
-        public String key;
-        public boolean hasValue;
-
+        /** Parameter key */
+        public final String key;
+        /** {@code true} if the parameter has a value */
+        public final boolean hasValue;
+
+        /** Map of all parameters by key */
         public static final Map<String, Param> paramsByKey = new HashMap<>();
         static {