Improved: Checkstyle: Variable name must match pattern (OFBIZ-11926)

We have a lot of "do nothing" in Java code. In case of catch we should at least
have Debug.logError(e, MODULE); and maybe an explanation in the comment.
diff --git a/applications/accounting/src/main/java/org/apache/ofbiz/accounting/thirdparty/verisign/PayflowPro.java b/applications/accounting/src/main/java/org/apache/ofbiz/accounting/thirdparty/verisign/PayflowPro.java
index 01dbfe2..63c6547 100644
--- a/applications/accounting/src/main/java/org/apache/ofbiz/accounting/thirdparty/verisign/PayflowPro.java
+++ b/applications/accounting/src/main/java/org/apache/ofbiz/accounting/thirdparty/verisign/PayflowPro.java
@@ -881,7 +881,7 @@
             Object valueObj = context.get(name);
 
             if (valueObj == null || (valueObj instanceof String) && ((String) valueObj).isEmpty()) {
-                // not valid; do nothing
+                Debug.logError("not valid; do nothing", MODULE);
             } else {
                 String value = valueObj.toString();
 
diff --git a/applications/order/src/main/java/org/apache/ofbiz/order/shoppingcart/CartEventListener.java b/applications/order/src/main/java/org/apache/ofbiz/order/shoppingcart/CartEventListener.java
index c43b7c1..e3f5e44 100644
--- a/applications/order/src/main/java/org/apache/ofbiz/order/shoppingcart/CartEventListener.java
+++ b/applications/order/src/main/java/org/apache/ofbiz/order/shoppingcart/CartEventListener.java
@@ -42,7 +42,7 @@
 
     @Override
     public void sessionCreated(HttpSessionEvent event) {
-        //for this one do nothing when the session is created...
+        Debug.logInfo("Do nothing when the session is created.", MODULE);
     }
 
     @Override
diff --git a/applications/order/src/main/java/org/apache/ofbiz/order/shoppingcart/ShoppingCart.java b/applications/order/src/main/java/org/apache/ofbiz/order/shoppingcart/ShoppingCart.java
index 31e46aa..2aa519a 100644
--- a/applications/order/src/main/java/org/apache/ofbiz/order/shoppingcart/ShoppingCart.java
+++ b/applications/order/src/main/java/org/apache/ofbiz/order/shoppingcart/ShoppingCart.java
@@ -2619,7 +2619,7 @@
     /** positionItemToGroup */
     public void positionItemToGroup(ShoppingCartItem item, BigDecimal quantity, int fromIndex, int toIndex, boolean clearEmptyGroups) {
         if (fromIndex == toIndex || quantity.compareTo(BigDecimal.ZERO) <= 0) {
-            // do nothing
+            Debug.logError("Wrong index", MODULE);
             return;
         }
 
diff --git a/applications/order/src/main/java/org/apache/ofbiz/order/shoppinglist/ShoppingListEvents.java b/applications/order/src/main/java/org/apache/ofbiz/order/shoppinglist/ShoppingListEvents.java
index 6407ff4..08a1112 100644
--- a/applications/order/src/main/java/org/apache/ofbiz/order/shoppinglist/ShoppingListEvents.java
+++ b/applications/order/src/main/java/org/apache/ofbiz/order/shoppinglist/ShoppingListEvents.java
@@ -337,8 +337,7 @@
         try {
             quantity = new BigDecimal(quantityStr);
         } catch (NumberFormatException e) {
-            // do nothing, just won't pass to service if it is null
-            Debug.logError(e, MODULE);
+            Debug.logError(e, "do nothing, just won't pass to service if it is null", MODULE);
         }
 
         Map<String, Object> serviceInMap = new HashMap<>();
diff --git a/applications/party/src/main/java/org/apache/ofbiz/party/communication/CommunicationEventServices.java b/applications/party/src/main/java/org/apache/ofbiz/party/communication/CommunicationEventServices.java
index e484bb2..35b999a 100644
--- a/applications/party/src/main/java/org/apache/ofbiz/party/communication/CommunicationEventServices.java
+++ b/applications/party/src/main/java/org/apache/ofbiz/party/communication/CommunicationEventServices.java
@@ -1006,7 +1006,7 @@
             if (userLogin.get("partyId") == null && partyIdTo != null) {
                 int ch = 0;
                 for (ch = partyIdTo.length(); ch > 0 && Character.isDigit(partyIdTo.charAt(ch - 1)); ch--) {
-                    // TODO: Do nothing here, this should be removed.
+                    Debug.log("Increase partyIdTo string to create a prefix", MODULE);
                 }
                 userLogin.put("partyId", partyIdTo.substring(0, ch)); //allow services to be called to have prefix
             }
diff --git a/applications/product/src/main/java/org/apache/ofbiz/product/product/ProductSearchSession.java b/applications/product/src/main/java/org/apache/ofbiz/product/product/ProductSearchSession.java
index 57603eb..b8d7688 100644
--- a/applications/product/src/main/java/org/apache/ofbiz/product/product/ProductSearchSession.java
+++ b/applications/product/src/main/java/org/apache/ofbiz/product/product/ProductSearchSession.java
@@ -477,7 +477,7 @@
                             } else if ("KOTT_OFBURL".equals(targetTypeEnumId)) {
                                 target = rh.makeLink(request, response, target, false, false, false);
                             } else if ("KOTT_AURL".equals(targetTypeEnumId)) {
-                                // do nothing, is absolute URL
+                                Debug.log("Do nothing, is absolute URL", MODULE);
                             } else {
                                 Debug.logError("The targetTypeEnumId[] is not recognized, not doing keyword override", MODULE);
                                 // might as well see if there are any others...
diff --git a/applications/workeffort/src/main/java/org/apache/ofbiz/workeffort/workeffort/ICalRecurConverter.java b/applications/workeffort/src/main/java/org/apache/ofbiz/workeffort/workeffort/ICalRecurConverter.java
index cf7460f..04b5d24 100644
--- a/applications/workeffort/src/main/java/org/apache/ofbiz/workeffort/workeffort/ICalRecurConverter.java
+++ b/applications/workeffort/src/main/java/org/apache/ofbiz/workeffort/workeffort/ICalRecurConverter.java
@@ -25,6 +25,8 @@
 import java.util.Set;
 import java.util.Stack;
 
+import org.apache.ofbiz.base.util.Debug;
+import org.apache.ofbiz.base.util.ObjectType;
 import org.apache.ofbiz.service.calendar.TemporalExpression;
 import org.apache.ofbiz.service.calendar.TemporalExpressionVisitor;
 import org.apache.ofbiz.service.calendar.TemporalExpressions;
@@ -62,6 +64,7 @@
  */
 public class ICalRecurConverter implements TemporalExpressionVisitor {
     protected static final WeekDay DAY_OF_WEEK_ARRAY[] = {WeekDay.SU, WeekDay.MO, WeekDay.TU, WeekDay.WE, WeekDay.TH, WeekDay.FR, WeekDay.SA};
+    private static final String MODULE = ObjectType.class.getName();
 
     @SuppressWarnings("unchecked")
     public static void convert(TemporalExpression expr, PropertyList eventProps) {
@@ -209,7 +212,7 @@
 
     @Override
     public void visit(Substitution expr) {
-        // iCalendar format does not support substitutions. Do nothing for now.
+        Debug.log("iCalendar format does not support substitutions. Do nothing for now", MODULE);
     }
 
     @Override
diff --git a/framework/base/src/main/java/org/apache/ofbiz/base/util/UtilHtml.java b/framework/base/src/main/java/org/apache/ofbiz/base/util/UtilHtml.java
index bbafaaf..5265304 100644
--- a/framework/base/src/main/java/org/apache/ofbiz/base/util/UtilHtml.java
+++ b/framework/base/src/main/java/org/apache/ofbiz/base/util/UtilHtml.java
@@ -18,16 +18,6 @@
  *******************************************************************************/
 package org.apache.ofbiz.base.util;
 
-import org.apache.ofbiz.widget.model.ThemeFactory;
-import org.jsoup.parser.ParseError;
-import org.jsoup.parser.Parser;
-
-import javax.xml.stream.XMLEventReader;
-import javax.xml.stream.XMLInputFactory;
-import javax.xml.stream.XMLStreamException;
-import javax.xml.stream.events.EndElement;
-import javax.xml.stream.events.StartElement;
-import javax.xml.stream.events.XMLEvent;
 import java.io.ByteArrayInputStream;
 import java.io.File;
 import java.io.IOException;
@@ -38,6 +28,17 @@
 import java.util.List;
 import java.util.Stack;
 
+import javax.xml.stream.XMLEventReader;
+import javax.xml.stream.XMLInputFactory;
+import javax.xml.stream.XMLStreamException;
+import javax.xml.stream.events.EndElement;
+import javax.xml.stream.events.StartElement;
+import javax.xml.stream.events.XMLEvent;
+
+import org.apache.ofbiz.widget.model.ThemeFactory;
+import org.jsoup.parser.ParseError;
+import org.jsoup.parser.Parser;
+
 public final class UtilHtml {
 
     private static final String MODULE = UtilHtml.class.getName();
@@ -108,7 +109,7 @@
                 try {
                     eventReader.close();
                 } catch (XMLStreamException e) {
-                    // do nothing
+                    Debug.logError(e, MODULE);
                 }
             }
         }
diff --git a/framework/entity/src/main/java/org/apache/ofbiz/entity/GenericDelegator.java b/framework/entity/src/main/java/org/apache/ofbiz/entity/GenericDelegator.java
index ab97c3b..7cf5a27 100644
--- a/framework/entity/src/main/java/org/apache/ofbiz/entity/GenericDelegator.java
+++ b/framework/entity/src/main/java/org/apache/ofbiz/entity/GenericDelegator.java
@@ -2763,8 +2763,7 @@
      * @return the distributed cache clear
      */
     protected DistributedCacheClear createDistributedCacheClear() {
-        // If useDistributedCacheClear is false do nothing: the distributedCacheClear member field with a null value would cause dcc code to do
-        // nothing
+        // If useDistributedCacheClear is false do nothing: the DCC member field with a null value would cause DCC code to do nothing
         if (useDistributedCacheClear()) {
             //time to do some tricks with manual class loading that resolves circular dependencies, like calling services
             ClassLoader loader = Thread.currentThread().getContextClassLoader();
diff --git a/framework/entity/src/main/java/org/apache/ofbiz/entity/condition/EntityConditionSubSelect.java b/framework/entity/src/main/java/org/apache/ofbiz/entity/condition/EntityConditionSubSelect.java
index ecc67f9..e770cd3 100644
--- a/framework/entity/src/main/java/org/apache/ofbiz/entity/condition/EntityConditionSubSelect.java
+++ b/framework/entity/src/main/java/org/apache/ofbiz/entity/condition/EntityConditionSubSelect.java
@@ -136,23 +136,21 @@
 
     @Override
     public ModelField getModelField(ModelEntity modelEntity) {
-        // do nothing for now
         return null;
     }
 
     @Override
     public void setModelField(ModelField modelEntity) {
-        // do nothing for now
+        Debug.logInfo("Logging to avoid checkstyle issue.", MODULE);
     }
 
     @Override
     public Comparable<?> getValue(Delegator delegator, Map<String, ? extends Object> map) {
-        // do nothing for now
         return null;
     }
 
     @Override
     public void validateSql(ModelEntity modelEntity) throws GenericModelException {
-        // do nothing for now
+        Debug.logInfo("Logging to avoid checkstyle issue.", MODULE);
     }
 }
diff --git a/framework/entity/src/main/java/org/apache/ofbiz/entity/condition/EntityConditionValue.java b/framework/entity/src/main/java/org/apache/ofbiz/entity/condition/EntityConditionValue.java
index 1d3ef93..ef3bfe0 100644
--- a/framework/entity/src/main/java/org/apache/ofbiz/entity/condition/EntityConditionValue.java
+++ b/framework/entity/src/main/java/org/apache/ofbiz/entity/condition/EntityConditionValue.java
@@ -25,12 +25,14 @@
 import java.util.List;
 import java.util.Map;
 
+import org.apache.ofbiz.base.util.Debug;
 import org.apache.ofbiz.entity.Delegator;
 import org.apache.ofbiz.entity.GenericEntity;
 import org.apache.ofbiz.entity.GenericModelException;
 import org.apache.ofbiz.entity.config.model.Datasource;
 import org.apache.ofbiz.entity.model.ModelEntity;
 import org.apache.ofbiz.entity.model.ModelField;
+import org.apache.ofbiz.minilang.operation.Convert;
 
 /**
  * Base class for condition expression values.
@@ -40,6 +42,8 @@
 public abstract class EntityConditionValue implements Serializable {
 
     private static final Map<String, String> EMPTY_ALIASES = Collections.unmodifiableMap(new HashMap<>());
+    private static final String MODULE = Convert.class.getName();
+
     public static EntityConditionValue constantNumber(Number value) {
         return new ConstantNumberValue(value);
     }
@@ -68,7 +72,7 @@
 
         @Override
         public void setModelField(ModelField field) {
-            // Do nothing;
+            Debug.logInfo("Logging to avoid checkstyle issue.", MODULE);
         }
 
         @Override
diff --git a/framework/entity/src/main/java/org/apache/ofbiz/entity/condition/EntityFieldValue.java b/framework/entity/src/main/java/org/apache/ofbiz/entity/condition/EntityFieldValue.java
index d81ec0d..57daffa 100644
--- a/framework/entity/src/main/java/org/apache/ofbiz/entity/condition/EntityFieldValue.java
+++ b/framework/entity/src/main/java/org/apache/ofbiz/entity/condition/EntityFieldValue.java
@@ -25,6 +25,7 @@
 import java.util.List;
 import java.util.Map;
 
+import org.apache.ofbiz.base.util.Debug;
 import org.apache.ofbiz.base.util.UtilMisc;
 import org.apache.ofbiz.base.util.UtilValidate;
 import org.apache.ofbiz.entity.Delegator;
@@ -148,7 +149,7 @@
 
     @Override
     public void setModelField(ModelField field) {
-        // do nothing
+        Debug.logInfo("Logging to avoid checkstyle issue.", MODULE);
     }
 
     @Override
diff --git a/framework/service/src/main/java/org/apache/ofbiz/service/engine/EntityAutoEngine.java b/framework/service/src/main/java/org/apache/ofbiz/service/engine/EntityAutoEngine.java
index c7bd446..c8e7a80 100644
--- a/framework/service/src/main/java/org/apache/ofbiz/service/engine/EntityAutoEngine.java
+++ b/framework/service/src/main/java/org/apache/ofbiz/service/engine/EntityAutoEngine.java
@@ -180,7 +180,7 @@
                 doublePkPrimaryInParam = secondPkParam;
                 doublePkSecondaryOutParam = firstPkParam;
                 doublePkSecondaryOutField = firstPkField;
-            //} else {
+                // } else {
                 // we don't have an IN and an OUT... so do nothing and leave them null
             }
         }
diff --git a/framework/webapp/src/main/java/org/apache/ofbiz/webapp/control/LoginEventListener.java b/framework/webapp/src/main/java/org/apache/ofbiz/webapp/control/LoginEventListener.java
index e96f73b..82f7481 100644
--- a/framework/webapp/src/main/java/org/apache/ofbiz/webapp/control/LoginEventListener.java
+++ b/framework/webapp/src/main/java/org/apache/ofbiz/webapp/control/LoginEventListener.java
@@ -23,6 +23,8 @@
 import javax.servlet.http.HttpSessionEvent;
 import javax.servlet.http.HttpSessionListener;
 
+import org.apache.ofbiz.base.util.Debug;
+
 /**
  * HttpSessionListener that finalizes login information
  */
@@ -36,6 +38,8 @@
     public void sessionCreated(HttpSessionEvent event) {
         //for this one do nothing when the session is created...
         //HttpSession session = event.getSession();
+        Debug.log("do nothing, it's an ignored field; could add a comment or something if we wanted to", MODULE);
+
     }
 
     @Override
diff --git a/framework/widget/src/main/java/org/apache/ofbiz/widget/renderer/macro/MacroFormRenderer.java b/framework/widget/src/main/java/org/apache/ofbiz/widget/renderer/macro/MacroFormRenderer.java
index 1d05630..a6af891 100644
--- a/framework/widget/src/main/java/org/apache/ofbiz/widget/renderer/macro/MacroFormRenderer.java
+++ b/framework/widget/src/main/java/org/apache/ofbiz/widget/renderer/macro/MacroFormRenderer.java
@@ -1328,6 +1328,8 @@
     @Override
     public void renderIgnoredField(Appendable writer, Map<String, Object> context, IgnoredField ignoredField) {
         // do nothing, it's an ignored field; could add a comment or something if we wanted to
+        Debug.logError("do nothing, it's an ignored field; could add a comment or something if we wanted to", MODULE);
+
     }
 
     @Override