Volevo salvare le eccezioni di un mio programma in java su un file di testo utilizzando il package util.logging del java

codice:
public static Logger getLogger(Object myClass) {
        Logger logger = null;
        try {
            // Create an appending file handler
            boolean append = true;
            //Create a file handler with a limit of 2 megabytes
            int limit = 2000000; // 2 Mb
            FileHandler handler = new FileHandler(log_abs_path, limit, 1, append);
        
            // Add to the desired logger
            logger = Logger.getLogger(myClass.getClass().getName());
            logger.addHandler(handler);
            
            
        } catch (IOException e) {
            e.printStackTrace();
        }
        return logger;
    }
Il codice riportato viene funziona correttamente, però il file di log lo scrive in formato HTML, di seguito un esempio:

codice:
<?xml version="1.0" encoding="windows-1252" standalone="no"?>
<!DOCTYPE log SYSTEM "logger.dtd">
<log>
<record>
  <date>2005-09-27T17:04:34</date>
  <millis>1127833474605</millis>
  <sequence>0</sequence>
  <logger>it.siai.listener.SiaiFrameListener</logger>
  <level>SEVERE</level>
  <class>it.siai.listener.SiaiFrameListener</class>
  <method>connectionToDatabase</method>
  <thread>10</thread>
  <message>Driver hsql del database non trovato, impossibile avviare il programma</message>
  <exception>
    <message>java.lang.ClassNotFoundException: org.hsqldb.jdbcDriver</message>
    <frame>
      <class>java.net.URLClassLoader$1</class>
      <method>run</method>
    </frame>
    <frame>
      <class>java.security.AccessController</class>
      <method>doPrivileged</method>
    </frame>
    <frame>
      <class>java.net.URLClassLoader</class>
      <method>findClass</method>
    </frame>
    <frame>
      <class>java.lang.ClassLoader</class>
      <method>loadClass</method>
    </frame>
    <frame>
      <class>sun.misc.Launcher$AppClassLoader</class>
      <method>loadClass</method>
    </frame>
ecc...
io invece lo forrei scritto in txt semplice nel seguente modo:

codice:
java.lang.ClassNotFoundException: org.hsqldb.jdbcDriver
	at java.net.URLClassLoader$1.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at java.lang.ClassLoader.loadClassInternal(Unknown Source)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Unknown Source)
	at it.siai.extra.DatabaseSiai.openConnectionToDatabase(DatabaseSiai.java:347)
	at it.siai.listener.SiaiFrameListener.connectionToDatabase(SiaiFrameListener.java:84)
	at it.siai.listener.SiaiFrameListener.<init>(SiaiFrameListener.java:60)
	at it.siai.main.Siai.createAndShowGUI(Siai.java:66)
	at it.siai.main.Siai.access$1(Siai.java:56)
	at it.siai.main.Siai$1.run(Siai.java:75)
	at java.awt.event.InvocationEvent.dispatch(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
Come faccio?