implemented brute force counter measure

core/src/main/java/de/srsoftware/umbrella/core/ConnectionProvider.java

@@ -1,6 +1,8 @@
 /* © SRSoftware 2025 */
 package de.srsoftware.umbrella.core;
 
+import static java.lang.System.Logger.Level.INFO;
+
 import java.io.File;
 import java.sql.Connection;
 import java.sql.SQLException;
@@ -8,7 +10,7 @@ import java.util.HashMap;
 import org.sqlite.SQLiteDataSource;
 
 public class ConnectionProvider {
-
+	private static final System.Logger LOG = System.getLogger(ConnectionProvider.class.getSimpleName());
 	private static final HashMap<File, Connection> connections = new HashMap<>();
 
 	private ConnectionProvider(){}
@@ -17,7 +19,10 @@ public class ConnectionProvider {
 		if (o instanceof String filename) o = new File(filename);
 		if (o instanceof File dbFile) try {
 			var conn = connections.get(dbFile);
-			if (conn == null) connections.put(dbFile, conn = open(dbFile));
+			if (conn == null) {
+				connections.put(dbFile, conn = open(dbFile));
+				LOG.log(INFO,"Using {0}",dbFile);
+			}
 			return conn;
 		} catch (SQLException sqle) {
 			throw new RuntimeException(sqle);