Thread: Hyperion errors please fix

Code:

src\org\hyperion\data\PersistenceManager.java:6: package org.hyperion.rs2.model.
content.misc does not exist
import org.hyperion.rs2.model.content.misc.FoodItem;
                                          ^
src\org\hyperion\data\PersistenceManager.java:7: package org.hyperion.rs2.model.
content.misc does not exist
import org.hyperion.rs2.model.content.misc.PrayerIcon;
                                          ^
src\org\hyperion\data\PersistenceManager.java:8: package com.thoughtworks.xstrea
m does not exist
import com.thoughtworks.xstream.XStream;
                               ^
src\org\hyperion\data\PersistenceManager.java:18: cannot find symbol
symbol  : class XStream
location: class org.hyperion.data.PersistenceManager
        private static XStream xstream;
                       ^
src\org\hyperion\rs2\model\Player.java:21: package org.hyperion.rs2.model.conten
t.skill does not exist
import org.hyperion.rs2.model.content.skill.Prayer;
                                           ^
src\org\hyperion\rs2\model\World.java:26: package org.hyperion.rs2.model.content
 does not exist
import org.hyperion.rs2.model.content.ContentManager;
                                     ^
src\org\hyperion\rs2\model\World.java:112: cannot find symbol
symbol  : class ContentManager
location: class org.hyperion.rs2.model.World
        private ContentManager contentManager = new ContentManager();
                ^
src\org\hyperion\rs2\model\World.java:300: cannot find symbol
symbol  : class ContentManager
location: class org.hyperion.rs2.model.World
        public ContentManager getContentManager(){
               ^
src\org\hyperion\data\PersistenceManager.java:21: cannot find symbol
symbol  : class XStream
location: class org.hyperion.data.PersistenceManager
                xstream = new XStream();
                              ^
src\org\hyperion\data\PersistenceManager.java:22: cannot find symbol
symbol  : class FoodItem
location: class org.hyperion.data.PersistenceManager
                xstream.alias("foodItem", FoodItem.class);
                                          ^
src\org\hyperion\data\PersistenceManager.java:23: cannot find symbol
symbol  : class PrayerIcon
location: class org.hyperion.data.PersistenceManager
                xstream.alias("icon", PrayerIcon.class);
                                      ^
src\org\hyperion\rs2\model\World.java:112: cannot find symbol
symbol  : class ContentManager
location: class org.hyperion.rs2.model.World
        private ContentManager contentManager = new ContentManager();
                                                    ^
12 errors
Press any key to continue . . .

Please fix. I have the files but i duno why its saying i dont.