More jdbc comment cleanups. Code looks very nice now.

src/interfaces/jdbc/example/ImageViewer.java

src/interfaces/jdbc/example/Unicode.java

src/interfaces/jdbc/example/basic.java

src/interfaces/jdbc/example/blobtest.java

src/interfaces/jdbc/example/corba/StockClient.java

src/interfaces/jdbc/example/corba/StockDB.java

src/interfaces/jdbc/example/corba/StockDispenserImpl.java

src/interfaces/jdbc/example/corba/StockItemImpl.java

src/interfaces/jdbc/example/corba/StockServer.java

src/interfaces/jdbc/example/datestyle.java

src/interfaces/jdbc/example/metadata.java

src/interfaces/jdbc/example/psql.java

src/interfaces/jdbc/example/threadsafe.java

src/interfaces/jdbc/utils/CheckVersion.java