BIS-190 SP-295 add javadoc

SVN: 27522

openbis/source/java/ch/systemsx/cisd/openbis/generic/shared/dto/identifier/SampleIdentifier.java

@@ -110,6 +110,9 @@ public class SampleIdentifier extends SampleOwnerIdentifier
         return new SampleOwnerIdentifier(getDatabaseInstanceLevel(), getSpaceLevel());
     }
 
+    /**
+     * String representation of this identifier (e.g. "/SPACE/PROJECT/SSID
+     */
     @Override
     public String toString()
     {

openbis/source/java/ch/systemsx/cisd/openbis/generic/shared/dto/identifier/SampleOwnerIdentifier.java

@@ -94,6 +94,9 @@ public class SampleOwnerIdentifier extends AbstractHashable implements Serializa
         return databaseInstanceIdentOrNull != null;
     }
 
+    /**
+     * String representation of this identifier.
+     */
     @Override
     public String toString()
     {