Problem while implementing ehCache Framework

Hi All,

we are getting empty cache name while requesting cache from
cacheManager object to return all cache which are register with it.
/*
Call.java
From main method of call we are initializing the cacheManager.
*/
public class Call {
    public static void main(String s[]){
        CacheProvider cp = initCache();
        System.out.println(cp.getCache("TripDAO"));
    }
    public static CacheProvider initCache(){
        CacheProvider cp = new CacheProvider();
        cp.init();
        return cp;
    }
}

/*
CacheProvider.java
In this class we are creating cacheManager and also adding cache to
created cacheManager
*/
public class CacheProvider {
    private CacheManager m_cacheManager = null;

    public void init() {
        m_cacheManager = new CacheManager();
        addCache();
    }

    private void addCache() {
        Ehcache c = new Cache("",
        1000,
        MemoryStoreEvictionPolicy.LRU,
        false, // Overflow to disk
        null, // Diskstore path
        false, // Eternal
        0, // Time to live
        0, // Time to idle
        false, // Disk persistance
        0, // Disk expiry ...
        null); // Event listener

        CachePopulationManager factory = new
CachePopulationManager("ServiceCatalog","TripDAO");

        System.out.println("CachePopulationManager: "+factory);

        SelfPopulatingCache spc = new SelfPopulatingCache(c,factory);

        System.out.println("SelfPopulatingCache:
"+spc.getCacheManager());

        m_cacheManager.addCache(spc);

        System.out.println("m_cacheManager.getEhcache(\"TripDAO\"):
"+m_cacheManager.getCacheNames());

        String cName[] = m_cacheManager.getCacheNames();

        for(int i=0;i<cName.length;i++)
            System.out.println("cacheName: "+cName[i]);
    }
}

/*
CachePopulationManager.java
*/
public class CachePopulationManager implements CacheEntryFactory,
BootstrapCacheLoader {

     * @param entryFactory
     * String representing the fully qualified name of the
DAO that
     * provides the logic of retreival of a single element
of a certain
     * cache
     */
    public CachePopulationManager(String cacheName, String
entryFactory) {
        m_cacheName = cacheName;
        m_entryFactory = entryFactory;
    }

    /**
     * Implementation of a method of the CacheEntryFactory interface,
This method is called
     * to create an element according to a given key
     *
     * @param key The key of the element needs to be created
     */
    public Object createEntry(Object key) throws Exception {
        Object entry = null;

        if (m_entryFactory == null || m_entryFactory.length() == 0) {
            throw new Exception("");
        }

        try {
            // call to DAO object to retrun value for requested key
and it'll stored by echCache api
        } finally {
        }
        return entry;
    }
}

/// Output of all sysout
CachePopulationManager: dvdrental.cache.CachePopulationManager@913750
SelfPopulatingCache: null "we are expecting it should not retrun null"
m_cacheManager.getEhcache("TripDAO"): [Ljava.lang.String;@1bac748
cacheName: //"here we are expecting it should return name of cache
i.e. TripDAP"
null //"we are expecting retrun object of cache"

We are new to cache api. Plesae suggest us...

Thanks & regards, Amit J.