--- a/src/main/java/alice/jungle/persistent/PersistentJournal.java	Wed Dec 25 18:48:54 2013 +0900
+++ b/src/main/java/alice/jungle/persistent/PersistentJournal.java	Wed Dec 25 20:02:26 2013 +0900
@@ -16,11 +16,11 @@
 
 public class PersistentJournal implements Journal {
 	
-	private static ChangeListWriter WRITER;
-	private static ChangeListReader READER;
+	private ChangeListWriter WRITER;
+	private ChangeListReader READER;
+	private OutputStream out;
+	private InputStream in;
 	private static MessagePack msgpack;
-	private static OutputStream out = null;
-	private static InputStream in = null;
 	
 	static {
 		msgpack = new MessagePack();
@@ -30,7 +30,7 @@
 	}
 	
 	public PersistentJournal(File file) throws FileNotFoundException {
-		out = new FileOutputStream(file);
+		out = new FileOutputStream(file,true);
 		in = new FileInputStream(file);
 		WRITER = new PersistentChangeListWriter(out);
 		READER = new PersistentChangeListReader(in);
@@ -43,26 +43,29 @@
 
 	@Override
 	public ChangeListWriter getWriter() {
-		return WRITER;
+		String timeStamp = Long.toString(System.currentTimeMillis());
+		String logFileName = timeStamp + ".log";
+		OutputStream outStream = null;
+		try {
+			outStream = new FileOutputStream(new File("./log/"+logFileName));
+		} catch (FileNotFoundException e) {
+			e.printStackTrace();
+		}
+		PersistentChangeListWriter writer = new PersistentChangeListWriter(outStream);
+		return writer; 
 	}
 	
 	public void setOutputFile(File file) throws FileNotFoundException {
-		out = new FileOutputStream(file);
-		WRITER = new PersistentChangeListWriter(out);
+		setOutputStream(new FileOutputStream(file, true));
 	}
 	
 	public void setInputFile(File file) throws FileNotFoundException {
-		in = new FileInputStream(file);
-		READER = new PersistentChangeListReader(in);
-	}
-	
-	public void close() throws IOException {
-		out.close();
-		in.close();
+		setInputStream(new FileInputStream(file));
 	}
 	
 	public void setOutputStream(OutputStream _out) {
 		out = _out;
+		WRITER = new PersistentChangeListWriter(out);		
 	}
 	
 	public OutputStream getOutputStream() {
@@ -71,8 +74,9 @@
 	
 	public void setInputStream(InputStream _in) {
 		in = _in;
+		READER = new PersistentChangeListReader(in);
 	}
-	
+
 	public InputStream getInputStream() {
 		return in;
 	}
@@ -80,5 +84,12 @@
 	public static MessagePack getMsgPackInstance() {
 		return msgpack;
 	}
+	
+	public void close() throws IOException {
+		out.close();
+		in.close();
+	}
+	
+
 
 }