Fix @Nullable annotations.

.classpath

@@ -57,6 +57,7 @@
 			<attribute name="org.eclipse.jst.component.nondependency" value=""/>
 		</attributes>
 	</classpathentry>
+	<classpathentry kind="lib" path="WebContent/WEB-INF/lib/jsr305-2.0.1.jar"/>
 	<classpathentry kind="con" path="org.eclipse.jdt.junit.JUNIT_CONTAINER/4">
 		<attributes>
 			<attribute name="org.eclipse.jst.component.nondependency" value=""/>

src/net/socialgamer/cah/data/ConnectedUsers.java

@@ -29,6 +29,8 @@ import java.util.HashMap;
 import java.util.Iterator;
 import java.util.Map;
 
+import javax.annotation.Nullable;
+
 import net.socialgamer.cah.Constants.DisconnectReason;
 import net.socialgamer.cah.Constants.LongPollEvent;
 import net.socialgamer.cah.Constants.LongPollResponse;
@@ -36,7 +38,6 @@ import net.socialgamer.cah.Constants.ReturnableData;
 import net.socialgamer.cah.data.QueuedMessage.MessageType;
 
 import com.google.inject.Singleton;
-import com.sun.istack.internal.Nullable;
 
 
 /**

src/net/socialgamer/cah/data/Game.java

@@ -36,6 +36,8 @@ import java.util.Set;
 import java.util.Timer;
 import java.util.TimerTask;
 
+import javax.annotation.Nullable;
+
 import net.socialgamer.cah.Constants.BlackCardData;
 import net.socialgamer.cah.Constants.ErrorCode;
 import net.socialgamer.cah.Constants.GameInfo;
@@ -55,7 +57,6 @@ import net.socialgamer.cah.db.WhiteCard;
 import org.hibernate.Session;
 
 import com.google.inject.Inject;
-import com.sun.istack.internal.Nullable;
 
 
 /**

src/net/socialgamer/cah/servlets/CahServlet.java

@@ -30,6 +30,7 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
+import javax.annotation.Nullable;
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
@@ -49,7 +50,6 @@ import org.json.simple.JSONObject;
 import org.json.simple.JSONValue;
 
 import com.google.inject.Injector;
-import com.sun.istack.internal.Nullable;
 
 
 /**