[Tdbc] Fix static analysis issue (#6228)

System.Reflection.Assembly.CreateInstance() can return null value.

Signed-off-by: Sangyoon Jang <jeremy.jang@samsung.com>

diff --git a/src/Tizen.Data.Tdbc/Tizen.Data.Tdbc/DriverManager.cs b/src/Tizen.Data.Tdbc/Tizen.Data.Tdbc/DriverManager.cs
index d7c1e113e5cfbb4b50bd3bea129341f270c0bf10..690f6dbb74bc344128c52555da210ec4b0c3219c 100644 (file)
--- a/src/Tizen.Data.Tdbc/Tizen.Data.Tdbc/DriverManager.cs
+++ b/src/Tizen.Data.Tdbc/Tizen.Data.Tdbc/DriverManager.cs
@@ -58,6 +58,11 @@ namespace Tizen.Data.Tdbc
                 throw new SystemException("Failed to open connection due to: " + ex);
             }
 
+            if (conn == null)
+            {
+                throw new SystemException("Failed to open connection");
+            }
+
             conn.Open(uri);
             return conn;
         }
@@ -90,6 +95,11 @@ namespace Tizen.Data.Tdbc
                 throw new SystemException("Failed to open connection due to: " + ex);
             }
 
+            if (conn == null)
+            {
+                throw new SystemException("Failed to open connection");
+            }
+
             conn.Open(connectionString);
             return conn;
         }