Document TabFile, GroupList, QueryList

Change-Id: Iaed2eaa5ac501eeb6f8cbda7d1352cec1260a84e

java/com/google/gerrit/server/account/VersionedAccountQueries.java

@@ -28,7 +28,12 @@ import java.util.List;
 import org.eclipse.jgit.errors.ConfigInvalidException;
 import org.eclipse.jgit.lib.CommitBuilder;
 
-/** Named Queries for user accounts. */
+/**
+ * Named Queries for user accounts.
+ *
+ * <p>Users can define aliases for change queries. These are stored as versioned account data and
+ * (de)serialized with this class.
+ */
 public class VersionedAccountQueries extends VersionedMetaData {
   private static final FluentLogger logger = FluentLogger.forEnclosingClass();
 

java/com/google/gerrit/server/git/meta/TabFile.java

@@ -27,6 +27,7 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
+/** (De)serializer for tab-delimited text files. */
 public class TabFile {
   @FunctionalInterface
   public interface Parser {

java/com/google/gerrit/server/project/GroupList.java

@@ -28,6 +28,12 @@ import java.util.List;
 import java.util.Map;
 import java.util.Set;
 
+/**
+ * File format for group name aliases.
+ *
+ * <p>Project configuration must use aliases for groups used in the permission section. The
+ * aliases/group mapping is stored in a file "groups", (de)serialized with this class.
+ */
 public class GroupList extends TabFile {
   private static final FluentLogger logger = FluentLogger.forEnclosingClass();