1 files changed, 3 insertions, 2 deletions
diff --git a/main/src/cgeo/geocaching/connector/UnknownConnector.java b/main/src/cgeo/geocaching/connector/UnknownConnector.java
index e9fecb9..05593d7 100644
--- a/main/src/cgeo/geocaching/connector/UnknownConnector.java
+++ b/main/src/cgeo/geocaching/connector/UnknownConnector.java
@@ -4,6 +4,7 @@ import cgeo.geocaching.Geocache;
 import cgeo.geocaching.ICache;
 
 import org.apache.commons.lang3.StringUtils;
+import org.eclipse.jdt.annotation.NonNull;
 
 public class UnknownConnector extends AbstractConnector {
 
@@ -13,7 +14,7 @@ public class UnknownConnector extends AbstractConnector {
     }
 
     @Override
-    public String getCacheUrl(Geocache cache) {
+    public String getCacheUrl(@NonNull Geocache cache) {
         return null; // we have no url for these caches
     }
 
@@ -28,7 +29,7 @@ public class UnknownConnector extends AbstractConnector {
     }
 
     @Override
-    public boolean canHandle(final String geocode) {
+    public boolean canHandle(final @NonNull String geocode) {
         return StringUtils.isNotBlank(geocode);
     }