Fixing 3 sonar code smells and 1 sonar bug

src/LCT.Common/FileParser.cs

@@ -23,7 +23,7 @@ public TomlTable ParseTomlFile(string filePath)
                 table = TOML.Parse(reader);
                 return table;
             }
-            catch(Exception ex)
+            catch(TomlParseException)
             {
                 return new TomlTable();
             }

src/LCT.PackageIdentifier/ConanProcessor.cs

@@ -292,7 +292,7 @@ private static void GetDependecyDetails(List<Component> componentsForBOM, List<C
         private static void GetPackagesForBom(ref List<Component> lstComponentForBOM, ref int noOfDevDependent, List<ConanPackage> nodePackages)
         {
             var rootNode = nodePackages.FirstOrDefault();
-            if (!rootNode.Dependencies.Any() || rootNode.Dependencies == null)
+            if (rootNode != null && (!rootNode.Dependencies.Any() || rootNode.Dependencies == null))
             {
                 throw new ArgumentNullException(nameof(nodePackages), "Dependency(requires) node name details not present in the root node.");
             }

src/LCT.PackageIdentifier/NugetDevDependencyParser.cs

@@ -44,7 +44,7 @@ public static NugetDevDependencyParser Instance
             }
         }
 
-        public List<Container> Parse(string configFile)
+        public static List<Container> Parse(string configFile)
         {
             List<Container> containerList = new();
 

src/LCT.PackageIdentifier/NugetProcessor.cs

@@ -619,8 +619,7 @@ private static string ReferenceTagDetailsForPackageReference(XmlNode childNode,
 
         private static List<NugetPackage> ParseAssetFile(string configFile)
         {
-            NugetDevDependencyParser nugetDevDependencyParser = NugetDevDependencyParser.Instance;
-            List<Container> containers = nugetDevDependencyParser.Parse(configFile);
+            List<Container> containers = NugetDevDependencyParser.Parse(configFile);
             return ConvertContainerAsNugetPackage(containers, configFile);
         }