diff --git a/src/org/dclermonte/siba/gui/CheckPanel.java b/src/org/dclermonte/siba/gui/CheckPanel.java
index 52e1ce7..d3437b3 100644
--- a/src/org/dclermonte/siba/gui/CheckPanel.java
+++ b/src/org/dclermonte/siba/gui/CheckPanel.java
@@ -57,7 +57,7 @@ public class CheckPanel extends JPanel
 {
     private static final long serialVersionUID = 4495957907349664847L;
     private static final ResourceBundle BUNDLE = ResourceBundle.getBundle("org.dclermonte.siba.gui.messages"); //$NON-NLS-1$
-    public static Logger logger = LoggerFactory.getLogger(CheckPanel.class);
+    private static Logger logger = LoggerFactory.getLogger(CheckPanel.class);
     private JTextField fileToCheckField;
 
     /**
diff --git a/src/org/dclermonte/siba/gui/SibaGUI.java b/src/org/dclermonte/siba/gui/SibaGUI.java
index 651f152..d2a509a 100644
--- a/src/org/dclermonte/siba/gui/SibaGUI.java
+++ b/src/org/dclermonte/siba/gui/SibaGUI.java
@@ -64,7 +64,7 @@ import org.slf4j.LoggerFactory;
 public final class SibaGUI
 {
     private static final ResourceBundle BUNDLE = ResourceBundle.getBundle("org.dclermonte.siba.gui.messages"); //$NON-NLS-1$
-    public static Logger logger = LoggerFactory.getLogger(SibaGUI.class);
+    private static Logger logger = LoggerFactory.getLogger(SibaGUI.class);
     private JFrame frmSimpleBackup;
 
     /**
diff --git a/src/org/dclermonte/siba/gui/SourceDirectorySelector.java b/src/org/dclermonte/siba/gui/SourceDirectorySelector.java
index 25845ee..a3c36ee 100644
--- a/src/org/dclermonte/siba/gui/SourceDirectorySelector.java
+++ b/src/org/dclermonte/siba/gui/SourceDirectorySelector.java
@@ -19,7 +19,7 @@ public class SourceDirectorySelector extends JFileChooser
 {
     private static final long serialVersionUID = 3782597353602048214L;
     private static final ResourceBundle BUNDLE = ResourceBundle.getBundle("org.dclermonte.siba.gui.messages"); //$NON-NLS-1$
-    public static Logger logger = LoggerFactory.getLogger(SourceDirectorySelector.class);
+    private static Logger logger = LoggerFactory.getLogger(SourceDirectorySelector.class);
 
     /**
      *
diff --git a/src/org/dclermonte/siba/gui/TargetDirectorySelector.java b/src/org/dclermonte/siba/gui/TargetDirectorySelector.java
index 817955e..b95ccf1 100644
--- a/src/org/dclermonte/siba/gui/TargetDirectorySelector.java
+++ b/src/org/dclermonte/siba/gui/TargetDirectorySelector.java
@@ -19,7 +19,7 @@ public class TargetDirectorySelector extends JFileChooser
 {
     private static final long serialVersionUID = 3782597353602048214L;
     private static final ResourceBundle BUNDLE = ResourceBundle.getBundle("org.dclermonte.siba.gui.messages"); //$NON-NLS-1$
-    public static Logger logger = LoggerFactory.getLogger(TargetDirectorySelector.class);
+    private static Logger logger = LoggerFactory.getLogger(TargetDirectorySelector.class);
 
     /**
      *