getCatalog(), getSchema() and getDatabaseProductVersion() should not throw exceptions

Author: HardworkingMarek

src/com/inet/excel/ExcelConnection.java

@@ -210,8 +210,7 @@ public void setCatalog( String catalog ) throws SQLException {
      */
     @Override
     public String getCatalog() throws SQLException {
-        ExcelDriver.throwExceptionAboutUnsupportedOperation();
-        return null;
+        return parser.getFileName();
     }
 
     /**
@@ -507,7 +506,6 @@ public void setSchema( String schema ) throws SQLException {
      */
     @Override
     public String getSchema() throws SQLException {
-        ExcelDriver.throwExceptionAboutUnsupportedOperation();
         return null;
     }
 

src/com/inet/excel/ExcelDatabaseMetaData.java

@@ -176,7 +176,6 @@ public boolean nullsAreSortedAtEnd() throws SQLException {
      */
     @Override
     public String getDatabaseProductVersion() throws SQLException {
-        ExcelDriver.throwExceptionAboutUnsupportedOperation();
         return null;
     }