Add private constructor to utility classes to hide the implicit public one (#7850)

common/src/main/java/org/openmetadata/annotations/utils/AnnotationChecker.java

@@ -8,6 +8,8 @@ import org.openmetadata.annotations.ExposedField;
 
 public class AnnotationChecker {
 
+  private AnnotationChecker() {}
+
   private static boolean checkIfAnyClassFieldsHasAnnotation(
       Class<?> objectClass, Class<? extends Annotation> annotationClass) {
     return checkIfAnyClassFieldsHasAnnotation(objectClass, annotationClass, new HashSet<>());

openmetadata-service/src/main/java/org/openmetadata/service/elasticsearch/ElasticSearchIndexFactory.java

@@ -15,6 +15,8 @@ import org.openmetadata.service.Entity;
 
 @Slf4j
 public class ElasticSearchIndexFactory {
+  private ElasticSearchIndexFactory() {}
+
   public static ElasticSearchIndex buildIndex(String entityType, EntityInterface entity) {
     switch (entityType) {
       case Entity.TABLE:

openmetadata-service/src/main/java/org/openmetadata/service/secrets/SecretsManagerFactory.java

@@ -17,6 +17,8 @@ import org.openmetadata.schema.services.connections.metadata.SecretsManagerProvi
 
 public class SecretsManagerFactory {
 
+  private SecretsManagerFactory() {}
+
   public static SecretsManager createSecretsManager(SecretsManagerConfiguration config, String clusterName) {
     SecretsManagerProvider secretManager =
         config != null && config.getSecretsManager() != null

openmetadata-service/src/main/java/org/openmetadata/service/socket/WebSocketManager.java

@@ -110,6 +110,8 @@ public class WebSocketManager {
   }
 
   public static class WebSocketManagerBuilder {
+    private WebSocketManagerBuilder() {}
+
     public static void build(EngineIoServerOptions eiOptions) {
       INSTANCE = new WebSocketManager(eiOptions);
     }

openmetadata-service/src/main/java/org/openmetadata/service/util/EmailUtil.java

@@ -267,6 +267,8 @@ public class EmailUtil {
   }
 
   public static class EmailUtilBuilder {
+    private EmailUtilBuilder() {}
+
     public static EmailUtil build(SmtpSettings smtpServerSettings) {
       if (INSTANCE == null) {
         INSTANCE = new EmailUtil(smtpServerSettings);

openmetadata-service/src/main/java/org/openmetadata/service/util/FilterUtil.java

@@ -39,6 +39,8 @@ public class FilterUtil {
   private static final String TEST_CASE_RESULT = "testCaseResult";
   private static final String WILDCARD_FILTER = "all";
 
+  private FilterUtil() {}
+
   public static boolean shouldProcessRequest(ChangeEvent changeEvent, Map<String, Map<EventType, Filters>> filtersMap) {
     if (filtersMap != null && !filtersMap.isEmpty()) {
       String entityType = changeEvent.getEntityType();

openmetadata-service/src/main/java/org/openmetadata/service/util/PasswordUtil.java

@@ -34,6 +34,8 @@ public class PasswordUtil {
     validator = new PasswordValidator(rules);
   }
 
+  private PasswordUtil() {}
+
   public static void validatePassword(String pwd) {
     PasswordData password = new PasswordData(pwd);
     RuleResult result = validator.validate(password);

openmetadata-service/src/main/java/org/openmetadata/service/util/TokenUtil.java

@@ -14,6 +14,8 @@ import org.openmetadata.schema.auth.RefreshToken;
 import org.openmetadata.schema.auth.TokenType;
 
 public class TokenUtil {
+  private TokenUtil() {}
+
   public static TokenInterface createNewTokenWithDefaults(UUID userId, UUID tokenId, TokenType type) {
     switch (type) {
       case EMAIL_VERIFICATION: