title: Converting OSM to mapfroge *.map file fails
body: <p>I'm using osmosis to conver OSM map file to *.map to use with mapsfroge in android. I installed the plugin through these steps:
   1) copy 'mapsforge-map-writer-0.3.0-jar-with-dependencies.jar' into
    'osmosis/lib/default' directory
   2) Create file 'osmosis-plugins.conf' into 'osmosis/config' directory
   3) Add this line to the file:
      org.mapsforge.map.writer.osmosis.MapFileWriterPluginLoader </p>
  
  <p>Now, when using this line :
  <code>osmosis --rb file=tehran.osm.pbf --mapfile-writer file=tehran.map type=hd</code></p>
  
  <p>I got this :</p>
  
  <p>.
  .</p>
  
  <pre><code>    `Sep 25, 2012 1:01:50 PM org.openstreetmap.osmosis.core.pipeline.common.ActiveTaskManager waitForCompletion
  SEVERE: Thread for task 1-rb failed
  java.lang.AbstractMethodError: org.mapsforge.map.writer.osmosis.MapFileWriterTas
  k.initialize(Ljava/util/Map;)V
          at crosby.binary.osmosis.OsmosisReader.run(OsmosisReader.java:43)
          at java.lang.Thread.run(Unknown Source)
  Sep 25, 2012 1:01:50 PM org.openstreetmap.osmosis.core.Osmosis main
  SEVERE: Execution aborted.
  org.openstreetmap.osmosis.core.OsmosisRuntimeException: One or more tasks failed
  .
          at org.openstreetmap.osmosis.core.pipeline.common.Pipeline.waitForComple
  tion(Pipeline.java:146)
          at org.openstreetmap.osmosis.core.Osmosis.run(Osmosis.java:92)
          at org.openstreetmap.osmosis.core.Osmosis.main(Osmosis.java:37)
          at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
          at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
          at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
          at java.lang.reflect.Method.invoke(Unknown Source)
          at org.codehaus.plexus.classworlds.launcher.Launcher.launchStandard(Laun
  cher.java:329)` 
  </code></pre>
  
  <p>.
  .
  .</p>
  
  <p>The file "tehran.osm.pbf" is inside the "bin" folder. And also I tested that with two other osm and osm.pbf file (downloded from other web sites). The store is same.</p>
  
  <p>Where is the problem?
  Is there another way to convert OSM to *.map file?
  I appreciate any help.</p>