Index: trunk/src/org/openstreetmap/josm/io/OsmBzip2Exporter.java
===================================================================
--- trunk/src/org/openstreetmap/josm/io/OsmBzip2Exporter.java	(revision 6717)
+++ trunk/src/org/openstreetmap/josm/io/OsmBzip2Exporter.java	(revision 6718)
@@ -2,4 +2,7 @@
 package org.openstreetmap.josm.io;
 
+/**
+ * OSM data exporter that compresses it in Bzip2 format.
+ */
 public class OsmBzip2Exporter extends OsmExporter {
 
@@ -11,5 +14,5 @@
     }
 
-    // compression handling is preformed in super-class
+    // compression handling is performed in super-class
 
 }
Index: trunk/src/org/openstreetmap/josm/io/OsmBzip2Importer.java
===================================================================
--- trunk/src/org/openstreetmap/josm/io/OsmBzip2Importer.java	(revision 6717)
+++ trunk/src/org/openstreetmap/josm/io/OsmBzip2Importer.java	(revision 6718)
@@ -6,14 +6,23 @@
 import org.openstreetmap.josm.actions.ExtensionFileFilter;
 
+/**
+ * OSM data importer that uncompresses it from Bzip2 format.
+ */
 public class OsmBzip2Importer extends OsmImporter {
 
+    /**
+     * File filter used to load/save Bzip2 compressed OSM files.
+     */
     public static final ExtensionFileFilter FILE_FILTER = new ExtensionFileFilter(
             "osm.bz2,osm.bz", "osm.bz2", tr("OSM Server Files bzip2 compressed") + " (*.osm.bz2 *.osm.bz)");
 
+    /**
+     * Constructs a new {@code OsmBzip2Importer}.
+     */
     public OsmBzip2Importer() {
         super(FILE_FILTER);
     }
 
-    // compression handling is preformed in super-class
+    // compression handling is performed in super-class
 
 }
Index: trunk/src/org/openstreetmap/josm/io/OsmGzipExporter.java
===================================================================
--- trunk/src/org/openstreetmap/josm/io/OsmGzipExporter.java	(revision 6717)
+++ trunk/src/org/openstreetmap/josm/io/OsmGzipExporter.java	(revision 6718)
@@ -2,11 +2,17 @@
 package org.openstreetmap.josm.io;
 
+/**
+ * OSM data exporter that compresses it in GZip format.
+ */
 public class OsmGzipExporter extends OsmExporter {
 
+    /**
+     * Constructs a new {@code OsmGzipExporter}.
+     */
     public OsmGzipExporter() {
         super(OsmGzipImporter.FILE_FILTER);
     }
 
-    // compression handling is preformed in super-class
+    // compression handling is performed in super-class
 
 }
Index: trunk/src/org/openstreetmap/josm/io/OsmGzipImporter.java
===================================================================
--- trunk/src/org/openstreetmap/josm/io/OsmGzipImporter.java	(revision 6717)
+++ trunk/src/org/openstreetmap/josm/io/OsmGzipImporter.java	(revision 6718)
@@ -6,14 +6,23 @@
 import org.openstreetmap.josm.actions.ExtensionFileFilter;
 
+/**
+ * OSM data importer that uncompresses it from Gzip format.
+ */
 public class OsmGzipImporter extends OsmImporter {
 
+    /**
+     * File filter used to load/save Gzip compressed OSM files.
+     */
     public static final ExtensionFileFilter FILE_FILTER = new ExtensionFileFilter(
             "osm.gz", "osm.gz", tr("OSM Server Files gzip compressed") + " (*.osm.gz)");
 
+    /**
+     * Constructs a new {@code OsmGzipImporter}.
+     */
     public OsmGzipImporter() {
         super(FILE_FILTER);
     }
 
-    // compression handling is preformed in super-class
+    // compression handling is performed in super-class
 
 }