Index: /applications/editors/josm/plugins/globalsat/src/org/kaintoch/gps/globalsat/dg100/ByteHelper.java
===================================================================
--- /applications/editors/josm/plugins/globalsat/src/org/kaintoch/gps/globalsat/dg100/ByteHelper.java	(revision 34119)
+++ /applications/editors/josm/plugins/globalsat/src/org/kaintoch/gps/globalsat/dg100/ByteHelper.java	(revision 34120)
@@ -13,11 +13,11 @@
 
     /**
-     *
-     * @param src
-     * @param startS
-     * @param len
-     * @param dest
-     * @param startD
-     * @return
+     * Copy one byte array into another
+     * @param src the array to copy data from
+     * @param startS start index in source array
+     * @param len number of entries to copy
+     * @param dest the array to copy into
+     * @param startD start index in target array
+     * @return the index pointer behind the last target array copied
      */
     public static int copyByteArr2ByteArr(byte src[], int startS, int len, byte dest[], int startD)
@@ -33,7 +33,7 @@
 
     /**
-     *
-     * @param byt
-     * @return
+     * Convert byte to unsigned integer
+     * @param byt byte value to convert
+     * @return unsigned integer
      */
     public static int byte2IntUnsigned(byte byt)
@@ -43,6 +43,7 @@
 
     /**
-     *
-     * @param nibble
+     * Convert 4 bit into hexadecimal character
+     * @param nibble value to convert (only last 4 bit used)
+     * @return character in range of 0 to F
      */
     private static char nibble2Char(int nibble)
@@ -73,6 +74,7 @@
 
     /**
-     *
-     * @return
+     * Convert byte to unsigned hexadecimal string
+     * @param byt byte value to convert
+     * @return 2 character string representing the last 8 bit
      */
     public static String byte2StringUnsigned(byte byt)
@@ -87,6 +89,7 @@
 
     /**
-     *
-     * @param byt
+     * Convert byte array to unsigned hexadecimal string
+     * @param byt array of bytes to convert
+     * @return hexadecimal string representing the byte array
      */
     public static String byteArray2String(byte byt[])
@@ -96,7 +99,8 @@
 
     /**
-     *
-     * @param byt
-     * @param cnt
+     * Convert byte array to unsigned hexadecimal string
+     * @param byt array of bytes to convert
+     * @param cnt number of entries to convert
+     * @return hexadecimal string representing the byte array
      */
     public static String byteArray2String(byte byt[], int cnt)
Index: /applications/editors/josm/plugins/globalsat/src/org/kaintoch/gps/globalsat/dg100/GpsRec.java
===================================================================
--- /applications/editors/josm/plugins/globalsat/src/org/kaintoch/gps/globalsat/dg100/GpsRec.java	(revision 34119)
+++ /applications/editors/josm/plugins/globalsat/src/org/kaintoch/gps/globalsat/dg100/GpsRec.java	(revision 34120)
@@ -114,5 +114,5 @@
     /**
      * Shows wether this is a valid GPS record.
-     * @return true if GPS record is valid; otherwise false.
+     * @return <code>true</code> if GPS record is valid; otherwise <code>false</code>.
      */
     public boolean isValid()
@@ -157,5 +157,6 @@
 
     /**
-     * @return Returns the dg100Latitude.
+     * Get latitude value
+     * @return Returns the dg100Latitude value.
      */
     public int getDg100Latitude()
@@ -255,6 +256,6 @@
     /**
      * Gets dg100Date and time as a String in given format.
-     * @param dateTimeFormat
-     * @return
+     * @param dateTimeFormat format string for date and time
+     * @return formated date and time
      */
     private String getStringDateTime(String dateTimeFormat)
@@ -271,4 +272,5 @@
 
     /**
+     * Get the altitude value
      * @return Returns the dg100Altitude.
      */
@@ -279,5 +281,6 @@
 
     /**
-     * @param dg100Altitude The dg100Altitude to set.
+     * Set the altitude value
+     * @param altitude The dg100Altitude to set.
      */
     private void setDg100Altitude(int altitude)
@@ -287,4 +290,5 @@
 
     /**
+     * Get date information
      * @return Returns the dg100Date.
      */
@@ -295,5 +299,6 @@
 
     /**
-     * @param dg100Date The dg100Date to set.
+     * Set date information
+     * @param date The dg100Date to set.
      */
     private void setDg100Date(int date)
@@ -304,5 +309,5 @@
 
     /**
-     * @return
+     * calculate date and time from individual components
      */
     private void calcDateTime()
@@ -319,4 +324,5 @@
 
     /**
+     * Get longitude value
      * @return Returns the dg100Longitude.
      */
@@ -327,5 +333,6 @@
 
     /**
-     * @param dg100Longitude The dg100Longitude to set.
+     * Set longitude value
+     * @param longitude The dg100Longitude to set.
      */
     private void setDg100Longitude(int longitude)
@@ -335,4 +342,5 @@
 
     /**
+     * Get speed value
      * @return Returns the dg100Speed.
      */
@@ -343,5 +351,6 @@
 
     /**
-     * @param dg100Speed The dg100Speed to set.
+     * Set speed value
+     * @param speed The dg100Speed to set.
      */
     private void setDg100Speed(int speed)
@@ -351,4 +360,5 @@
 
     /**
+     * Get timezone value
      * @return Returns the dg100TimeZ.
      */
@@ -359,5 +369,6 @@
 
     /**
-     * @param dg100TimeZ The dg100TimeZ to set.
+     * Set timezone value
+     * @param timeZ The dg100TimeZ to set.
      */
     private void setDg100TimeZ(int timeZ)
@@ -368,5 +379,6 @@
 
     /**
-     * @param dg100Latitude The dg100Latitude to set.
+     * Set latitude value
+     * @param latitude The dg100Latitude to set.
      */
     private void setDg100Latitude(int latitude)
Index: /applications/editors/josm/plugins/globalsat/src/org/openstreetmap/josm/plugins/globalsat/GlobalsatDg100.java
===================================================================
--- /applications/editors/josm/plugins/globalsat/src/org/openstreetmap/josm/plugins/globalsat/GlobalsatDg100.java	(revision 34119)
+++ /applications/editors/josm/plugins/globalsat/src/org/openstreetmap/josm/plugins/globalsat/GlobalsatDg100.java	(revision 34120)
@@ -133,6 +133,6 @@
 
     /**
-     * Export DG-100's complete data to a GPX file.
-     * @param port DG-100 is connected to port.
+     * Import DG-100's complete data
+     * @param progressMonitor user progress interface 
      */
     public GpxData readData(ProgressMonitor progressMonitor) throws ConnectionException {