tdf#42982: Improve UNO API error reporting

Change-Id: I78c6fed4e94f1ebfc772db4dec9955da7230bc3f
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/109071
Reviewed-by: Michael Stahl <michael.stahl@allotropia.de>
Tested-by: Jenkins

embeddedobj/source/msole/olepersist.cxx

@@ -102,7 +102,7 @@ OUString GetNewTempFileURL_Impl( const uno::Reference< uno::XComponentContext >&
     }
 
     if ( aResult.isEmpty() )
-        throw uno::RuntimeException(); // TODO: can not create tempfile
+        throw uno::RuntimeException("Cannot create tempfile.");
 
     return aResult;
 }

package/source/xstor/owriteablestream.cxx

@@ -237,7 +237,7 @@ OUString GetNewTempFileURL( const uno::Reference< uno::XComponentContext >& rCon
     }
 
     if ( aTempURL.isEmpty() )
-        throw uno::RuntimeException(); // TODO: can not create tempfile
+        throw uno::RuntimeException("Cannot create tempfile.");
 
     return aTempURL;
 }

sfx2/source/doc/doctemplateslocal.cxx

@@ -122,7 +122,7 @@ DocTemplLocaleHelper::~DocTemplLocaleHelper()
 std::vector< beans::StringPair > const & DocTemplLocaleHelper::GetParsingResult() const
 {
     if ( !m_aElementsSeq.empty() )
-        throw uno::RuntimeException(); // the parsing has still not finished!
+        throw uno::RuntimeException("The parsing has still not finished!");
 
     return m_aResultSeq;
 }

svl/source/fsstor/fsfactory.cxx

@@ -40,7 +40,7 @@ uno::Reference< uno::XInterface > SAL_CALL FSStorageFactory::createInstance()
     OUString aTempURL = ::utl::TempFile( nullptr, true ).GetURL();
 
     if ( aTempURL.isEmpty() )
-        throw uno::RuntimeException(); // TODO: can not create tempfile
+        throw uno::RuntimeException("Cannot create tempfile.");
 
     ::ucbhelper::Content aResultContent(
         aTempURL, uno::Reference< ucb::XCommandEnvironment >(),

xmloff/source/meta/xmlversion.cxx

@@ -325,7 +325,7 @@ void SAL_CALL XMLVersionListPersistence::store( const uno::Reference< embed::XSt
 
         Reference< io::XOutputStream > xOut = xVerStream->getOutputStream();
         if ( !xOut.is() )
-            throw uno::RuntimeException(); // the stream was successfully opened for writing already
+            throw uno::RuntimeException("The stream was successfully opened for writing already!");
 
         xWriter->setOutputStream(xOut);