Cleanup:

- Improve Javadoc documentation
- Javadoc: add missing documentation for <T> (the IDE or checkstyle flags this) 
- Javadoc: removed trailing whitespace
- Remove @Override tag because this won't compile with JDK 5
- Flag that there is something wrong (what if 'y' isn't a Number? anyway instanceof should be avoided)

h2/src/tools/org/h2/jaqu/IncrementColumn.java

@@ -7,8 +7,9 @@
 package org.h2.jaqu;
 
 /**
- * This class represents a "column=(column + 1)" token for a SET statement.
+ * This class represents "SET column = (column + 1)" in an UPDATE statement.
  *
+ * @param <T> the query type
  * @param <A> the new value data type
  */
 //## Java 1.5 begin ##
@@ -22,25 +23,27 @@ public class IncrementColumn<T, A> implements Declaration {
         this.query = query;
         this.x = x;
     }
-    
+
     public Query<T> by(A y) {
         query.addDeclarationToken(this);
         this.y = y;
         return query;
     }
 
-    @Override
     public void appendSQL(SQLStatement stat) {
         query.appendSQL(stat, x);
         stat.appendSQL("=(");
         query.appendSQL(stat, x);
+        int todoSomethingWrongHere;
         if (y instanceof Number) {
             Number n = (Number) y;
-            if (n.doubleValue() > 0)
+            if (n.doubleValue() > 0) {
                 stat.appendSQL("+");
+            }
         }
         stat.appendSQL(y.toString());
         stat.appendSQL(")");
-    }  
+    }
+
 }
 //## Java 1.5 end ##

h2/src/tools/org/h2/jaqu/SQLDialect.java

@@ -57,7 +57,6 @@ public interface SQLDialect {
      */
     public static class DefaultSQLDialect implements SQLDialect {
 
-        @Override
         public String tableName(String schema, String table) {
             if (StringUtils.isNullOrEmpty(schema)) {
                 return table;
@@ -65,7 +64,6 @@ public interface SQLDialect {
             return schema + "." + table;
         }
 
-        @Override
         public String createIndex(String schema, String table, IndexDefinition index) {
             StatementBuilder buff = new StatementBuilder();
             buff.append("CREATE ");
@@ -95,12 +93,10 @@ public interface SQLDialect {
             return buff.toString();
         }
 
-        @Override
         public void appendLimit(SQLStatement stat, long limit) {
             stat.appendSQL(" LIMIT " + limit);
         }
 
-        @Override
         public void appendOffset(SQLStatement stat, long offset) {
             stat.appendSQL(" OFFSET " + offset);
         }

h2/src/tools/org/h2/jaqu/SetColumn.java

@@ -7,8 +7,9 @@
 package org.h2.jaqu;
 
 /**
- * This class represents a "column=value" token for a SET statement.
+ * This class represents "SET column = value" in an UPDATE statement.
  *
+ * @param <T> the query type
  * @param <A> the new value data type
  */
 //## Java 1.5 begin ##
@@ -22,18 +23,18 @@ public class SetColumn<T, A> implements Declaration {
         this.query = query;
         this.x = x;
     }
-    
+
     public Query<T> to(A y) {
         query.addDeclarationToken(this);
         this.y = y;
         return query;
     }
 
-    @Override
     public void appendSQL(SQLStatement stat) {
         query.appendSQL(stat, x);
         stat.appendSQL("=?");
         stat.addParameter(y);
     }
+
 }
 //## Java 1.5 end ##