diff --git a/LinphoneCoreFactoryImpl.java b/LinphoneCoreFactoryImpl.java
index 712e27b63..e86f0b100 100644
--- a/LinphoneCoreFactoryImpl.java
+++ b/LinphoneCoreFactoryImpl.java
@@ -68,4 +68,16 @@ public class LinphoneCoreFactoryImpl extends LinphoneCoreFactory {
 		//not implemented on Android
 		
 	}
+
+	@Override
+	LinphoneFriend createLinphoneFriend(String friendUri) {
+		// TODO Auto-generated method stub
+		return null;
+	}
+
+	@Override
+	LinphoneFriend createLinphoneFriend() {
+		// TODO Auto-generated method stub
+		return null;
+	}
 }
diff --git a/LinphoneCoreImpl.java b/LinphoneCoreImpl.java
index e042b3951..223a52fdc 100644
--- a/LinphoneCoreImpl.java
+++ b/LinphoneCoreImpl.java
@@ -270,5 +270,18 @@ class LinphoneCoreImpl implements LinphoneCore {
 	public void stopDtmf() {
 		stopDtmf(nativePtr);
 	}
+	public void addFriend(LinphoneFriend lf) throws LinphoneCoreException {
+		// TODO Auto-generated method stub
+		
+	}
+	public LinphoneChatRoom createChatRoom(String to) {
+		// TODO Auto-generated method stub
+		return null;
+	}
+	public void setPresenceInfo(int minuteAway, String alternativeContact,
+			OnlineStatus status) {
+		// TODO Auto-generated method stub
+		
+	}
 
 }