diff -r 6ae5e4f8329b -r c404a87db5b7 src/org/sonews/daemon/command/Command.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/org/sonews/daemon/command/Command.java	Sun Aug 29 17:43:58 2010 +0200
@@ -0,0 +1,51 @@
+/*
+ *   SONEWS News Server
+ *   see AUTHORS for the list of contributors
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.sonews.daemon.command;
+
+import java.io.IOException;
+import org.sonews.daemon.NNTPConnection;
+import org.sonews.storage.StorageBackendException;
+
+/**
+ * Interface for pluggable NNTP commands handling classes.
+ * @author Christian Lins
+ * @since sonews/0.6.0
+ */
+public interface Command
+{
+
+  /**
+   * @return true if this instance can be reused.
+   */
+  boolean hasFinished();
+
+  /**
+   * Returns capability string that is implied by this command class.
+   * MAY return null if the command is required by the NNTP standard.
+   */
+  String impliedCapability();
+
+  boolean isStateful();
+
+  String[] getSupportedCommandStrings();
+
+  void processLine(NNTPConnection conn, String line, byte[] rawLine)
+    throws IOException, StorageBackendException;
+
+}