add comments

h2/src/main/org/h2/mvstore/Page.java

@@ -155,7 +155,7 @@ public class Page {
     /**
      * Read a page.
      *
-     * @param file the file
+     * @param fileStore the file store
      * @param map the map
      * @param pos the page position
      * @param filePos the position in the file

h2/src/main/org/h2/tools/MultiDimension.java

@@ -201,7 +201,7 @@ public class MultiDimension implements Comparator<long[]> {
      *
      * @param min the minimum value
      * @param max the maximum value
-     * @return the list of ranges
+     * @return the list of ranges (low,high pairs)
      */
     private long[][] getMortonRanges(int[] min, int[] max) {
         int len = min.length;
@@ -236,8 +236,8 @@ public class MultiDimension implements Comparator<long[]> {
     /**
      * Combine entries if the size of the list is too large.
      *
-     * @param list the size of the list
-     * @param total
+     * @param list list of pairs(low,high) 
+     * @param total product of the gap lengths
      */
     private void combineEntries(ArrayList<long[]> list, int total) {
         Collections.sort(list, this);