close connection before initializing a new one

src/main/java/HdbArchiver/Collector/DbProxy.java

@@ -314,7 +314,7 @@ public final class DbProxy {
         if (manager != null) {
             manager.closeConnection();
             if (inserter instanceof HDBOracleAttributeInsert) {
-                ((HDBOracleAttributeInsert) inserter).closeConnections();
+                ((HDBOracleAttributeInsert) inserter).closeConnection();
             }
         }
     }

src/main/java/HdbArchiver/HdbArchiver.java

@@ -625,6 +625,9 @@ public class HdbArchiver extends DeviceImpl implements TangoConst {
 
             HdbTdbConnectionParameters.printHDBConnectionInfoLog();
 
+            if (dbProxy != null) {
+                dbProxy.closeConnection();
+            }
             dbProxy = new DbProxy(dbHost, dbName, dbSchema, dbUser, dbPassword, isRac, logger);
             // setControlMode(safetyPeriod);
             // start archiving in a thread