ok

Essentials/src/com/earth2me/essentials/OfflinePlayer.java

@@ -653,6 +653,16 @@ public class OfflinePlayer implements Player {
     public void setTotalExperience(int i) {
     }
 
+    @Override
+    public void sendExperienceChange(float v) {
+
+    }
+
+    @Override
+    public void sendExperienceChange(float v, int i) {
+
+    }
+
     @Override
     public float getExhaustion() {
         return 0F;

Essentials/src/com/earth2me/essentials/craftbukkit/FakeWorld.java

@@ -448,6 +448,26 @@ public class FakeWorld implements World {
         throw new UnsupportedOperationException("Not supported yet.");
     }
 
+    @Override
+    public int getHighestBlockYAt(int i, int i1, HeightMap heightMap) {
+        return 0;
+    }
+
+    @Override
+    public int getHighestBlockYAt(Location location, HeightMap heightMap) {
+        return 0;
+    }
+
+    @Override
+    public Block getHighestBlockAt(int i, int i1, HeightMap heightMap) {
+        return null;
+    }
+
+    @Override
+    public Block getHighestBlockAt(Location location, HeightMap heightMap) {
+        return null;
+    }
+
     @Override
     public Biome getBiome(int i, int i1) {
         throw new UnsupportedOperationException("Not supported yet.");
@@ -553,6 +573,16 @@ public class FakeWorld implements World {
         throw new UnsupportedOperationException("Not supported yet.");
     }
 
+    @Override
+    public boolean isHardcore() {
+        return false;
+    }
+
+    @Override
+    public void setHardcore(boolean b) {
+
+    }
+
     @Override
     public long getTicksPerAnimalSpawns() {
         throw new UnsupportedOperationException("Not supported yet.");