Fix SAT warnings (#14202)

* Fix SAT warnings

- checkstyle.ModifierOrderCheck
- checkstyle.OneStatementPerLineCheck
- checkstyle.NeedBracesCheck
- PMD.UseStandardCharsets
- PMD.UseCollectionIsEmpty
- PMD.UnusedLocalVariable
- PMD.SimplifyBooleanReturns where reasonable, suppress where
readability is better without change
- PMD.SimplifyBooleanExpressions

* Include StandardCharsets

Signed-off-by: Holger Friedrich <mail@holger-friedrich.de>

bundles/org.openhab.persistence.influxdb/src/main/java/org/openhab/persistence/influxdb/internal/influx2/Influx2FilterCriteriaQueryCreatorImpl.java

@@ -73,11 +73,12 @@ public class Influx2FilterCriteriaQueryCreatorImpl implements FilterCriteriaQuer
                 flux = flux.filter(tag(TAG_ITEM_NAME).equal(itemName));
             }
 
-            if (needsToUseItemTagName)
+            if (needsToUseItemTagName) {
                 flux = flux.keep(new String[] { FIELD_MEASUREMENT_NAME, COLUMN_TIME_NAME_V2, COLUMN_VALUE_NAME_V2,
                         TAG_ITEM_NAME });
-            else
+            } else {
                 flux = flux.keep(new String[] { FIELD_MEASUREMENT_NAME, COLUMN_TIME_NAME_V2, COLUMN_VALUE_NAME_V2 });
+            }
         }
 
         if (criteria.getState() != null && criteria.getOperator() != null) {