all occurances of UserFailureException replaced by either StorageException or...

all occurances of UserFailureException replaced by either StorageException or DataStructureException

SVN: 2251

bds/source/java/ch/systemsx/cisd/bds/DataStructureV1_0.java

@@ -18,7 +18,6 @@ package ch.systemsx.cisd.bds;
 
 import ch.systemsx.cisd.bds.storage.IDirectory;
 import ch.systemsx.cisd.bds.storage.IStorage;
-import ch.systemsx.cisd.common.exceptions.UserFailureException;
 
 /**
  * Data structure Version 1.0.