Added eclipse plugin to build. Some minor fixes to remove eclipse warnings.

core/src/main/java/org/springframework/security/authentication/AuthenticationDetailsSourceImpl.java

@@ -18,7 +18,7 @@ import java.lang.reflect.Constructor;
  * @deprecated Write an implementation of AuthenticationDetailsSource which returns the desired type directly.
  */
 @Deprecated
-public class AuthenticationDetailsSourceImpl implements AuthenticationDetailsSource {
+public class AuthenticationDetailsSourceImpl implements AuthenticationDetailsSource<Object, Object> {
     //~ Instance fields ================================================================================================
 
     private Class<?> clazz = AuthenticationDetails.class;