diff -r 7f84f4de2893 -r 5d7d1adf387f src/org/sonews/storage/impl/HSQLDB.java
--- a/src/org/sonews/storage/impl/HSQLDB.java	Mon Jun 06 20:12:21 2011 +0200
+++ b/src/org/sonews/storage/impl/HSQLDB.java	Tue Jun 07 11:55:22 2011 +0200
@@ -17,141 +17,14 @@
  */
 package org.sonews.storage.impl;
 
-import java.util.List;
-import org.sonews.feed.Subscription;
-import org.sonews.storage.Article;
-import org.sonews.storage.ArticleHead;
-import org.sonews.storage.Channel;
-import org.sonews.storage.Group;
 import org.sonews.storage.Storage;
-import org.sonews.storage.StorageBackendException;
-import org.sonews.util.Pair;
 
 /**
- *
+ * A specialized JDBCDatabase supporting HSQLDB.
  * @author Christian Lins
  * @since sonews/1.1
  */
-public class HSQLDB implements Storage {
+public class HSQLDB extends JDBCDatabase implements Storage {
 
-	public void addArticle(Article art) throws StorageBackendException {
-		throw new UnsupportedOperationException("Not supported yet.");
-	}
-
-	public void addEvent(long timestamp, int type, long groupID) throws StorageBackendException {
-		throw new UnsupportedOperationException("Not supported yet.");
-	}
-
-	public void addGroup(String groupname, int flags) throws StorageBackendException {
-		throw new UnsupportedOperationException("Not supported yet.");
-	}
-
-	public int countArticles() throws StorageBackendException {
-		throw new UnsupportedOperationException("Not supported yet.");
-	}
-
-	public int countGroups() throws StorageBackendException {
-		throw new UnsupportedOperationException("Not supported yet.");
-	}
-
-	public void delete(String messageID) throws StorageBackendException {
-		throw new UnsupportedOperationException("Not supported yet.");
-	}
-
-	public Article getArticle(String messageID) throws StorageBackendException {
-		throw new UnsupportedOperationException("Not supported yet.");
-	}
-
-	public Article getArticle(long articleIndex, long groupID) throws StorageBackendException {
-		throw new UnsupportedOperationException("Not supported yet.");
-	}
-
-	public List<Pair<Long, String>> getArticleHeaders(Channel channel, long start, long end, String header, String pattern) throws StorageBackendException {
-		throw new UnsupportedOperationException("Not supported yet.");
-	}
-
-	public List<Pair<Long, ArticleHead>> getArticleHeads(Group group, long first, long last) throws StorageBackendException {
-		throw new UnsupportedOperationException("Not supported yet.");
-	}
-
-	public long getArticleIndex(Article art, Group group) throws StorageBackendException {
-		throw new UnsupportedOperationException("Not supported yet.");
-	}
-
-	public List<Long> getArticleNumbers(long groupID) throws StorageBackendException {
-		throw new UnsupportedOperationException("Not supported yet.");
-	}
-
-	public String getConfigValue(String key) throws StorageBackendException {
-		throw new UnsupportedOperationException("Not supported yet.");
-	}
-
-	public int getEventsCount(int eventType, long startTimestamp, long endTimestamp, Channel channel) throws StorageBackendException {
-		throw new UnsupportedOperationException("Not supported yet.");
-	}
-
-	public double getEventsPerHour(int key, long gid) throws StorageBackendException {
-		throw new UnsupportedOperationException("Not supported yet.");
-	}
-
-	public int getFirstArticleNumber(Group group) throws StorageBackendException {
-		throw new UnsupportedOperationException("Not supported yet.");
-	}
-
-	public Group getGroup(String name) throws StorageBackendException {
-		throw new UnsupportedOperationException("Not supported yet.");
-	}
-
-	public List<Channel> getGroups() throws StorageBackendException {
-		throw new UnsupportedOperationException("Not supported yet.");
-	}
-
-	public List<String> getGroupsForList(String listAddress) throws StorageBackendException {
-		throw new UnsupportedOperationException("Not supported yet.");
-	}
-
-	public int getLastArticleNumber(Group group) throws StorageBackendException {
-		throw new UnsupportedOperationException("Not supported yet.");
-	}
-
-	public List<String> getListsForGroup(String groupname) throws StorageBackendException {
-		throw new UnsupportedOperationException("Not supported yet.");
-	}
-
-	public String getOldestArticle() throws StorageBackendException {
-		throw new UnsupportedOperationException("Not supported yet.");
-	}
-
-	public int getPostingsCount(String groupname) throws StorageBackendException {
-		throw new UnsupportedOperationException("Not supported yet.");
-	}
-
-	public List<Subscription> getSubscriptions(int type) throws StorageBackendException {
-		throw new UnsupportedOperationException("Not supported yet.");
-	}
-
-	public boolean isArticleExisting(String messageID) throws StorageBackendException {
-		throw new UnsupportedOperationException("Not supported yet.");
-	}
-
-	public boolean isGroupExisting(String groupname) throws StorageBackendException {
-		throw new UnsupportedOperationException("Not supported yet.");
-	}
-
-	public void purgeGroup(Group group) throws StorageBackendException {
-		throw new UnsupportedOperationException("Not supported yet.");
-	}
-
-	public void setConfigValue(String key, String value) throws StorageBackendException {
-		throw new UnsupportedOperationException("Not supported yet.");
-	}
-
-	public boolean update(Article article) throws StorageBackendException {
-		throw new UnsupportedOperationException("Not supported yet.");
-	}
-
-	public boolean update(Group group) throws StorageBackendException {
-		throw new UnsupportedOperationException("Not supported yet.");
-	}
 
 }