Added connection close safety

- moved connection close outside of try catch to finally to ensure that the connection is closed even on error (SqliteManager)

src/main/kotlin/net/trivernis/chunkmaster/lib/SqliteManager.kt

@@ -79,6 +79,7 @@ class SqliteManager(private val chunkmaster: Chunkmaster) {
     fun executeStatement(sql: String, values: HashMap<Int, Any>, callback: ((ResultSet) -> Unit)?) {
         val connection = getConnection()
         if (connection != null) {
+            try {
                 val statement = connection.prepareStatement(sql)
                 for (parameterValue in values) {
                     statement.setObject(parameterValue.key, parameterValue.value)
@@ -89,7 +90,12 @@ class SqliteManager(private val chunkmaster: Chunkmaster) {
                     callback(res)
                 }
                 statement.close()
+            } catch (e: Exception) {
+                chunkmaster.logger.severe("An error occured on sql $sql. ${e.message}")
+                chunkmaster.logger.info(ExceptionUtils.getStackTrace(e))
+            } finally {
                 connection.close()
+            }
         } else {
             chunkmaster.logger.severe("Could not execute sql $sql. No database connection established.")
         }