diff -r 1feed5fbf147 -r d54786065fa3 src/org/sonews/storage/impl/DrupalDatabase.java
--- a/src/org/sonews/storage/impl/DrupalDatabase.java	Wed Oct 12 00:25:14 2011 +0200
+++ b/src/org/sonews/storage/impl/DrupalDatabase.java	Wed Oct 19 21:40:51 2011 +0200
@@ -28,6 +28,7 @@
 import java.util.logging.Level;
 import java.util.logging.Logger;
 import org.sonews.config.Config;
+import org.sonews.daemon.Connections;
 import org.sonews.feed.Subscription;
 import org.sonews.storage.Article;
 import org.sonews.storage.ArticleHead;
@@ -387,9 +388,41 @@
 		return Collections.emptyList();
 	}
 
+	/**
+	 * Checks username and password.
+	 * @param username
+	 * @param password
+	 * @return true if credentials are valid | false otherwise
+	 * @throws StorageBackendException it there is any error during authentication process 
+	 * (but should not be thrown if only bad thing is wrong username or password)
+	 */
+	@Override
+	public boolean authenticateUser(String username, char[] password) throws StorageBackendException {
+		PreparedStatement ps = null;
+		ResultSet rs = null;
+		try {
+			ps = conn.prepareStatement("SELECT nntp_login(?, ?)");
+			ps.setString(1, username);
+			ps.setString(2, String.copyValueOf(password));
+			rs = ps.executeQuery();
+			rs.next();
+			return rs.getInt(1) == 1;
+		} catch (Exception e) {
+			throw new StorageBackendException(e);
+		} finally {
+			close(null, ps, rs);
+		}
+	}
+
 	@Override
 	public void addArticle(Article art) throws StorageBackendException {
-		log.log(Level.SEVERE, "TODO: addArticle {0}", new Object[]{art});
+		if (art.getAuthenticatedUser() == null) {
+			log.log(Level.SEVERE, "User was not authenticated, so his article was rejected.");
+			throw new StorageBackendException("User must be authenticated to post articles");
+		} else {
+
+			log.log(Level.INFO, "User ''{0}'' has posted an article", art.getAuthenticatedUser());
+		}
 	}
 
 	@Override