diff --git a/src/main/java/tech/jhipster/lite/generator/client/angular/common/domain/AngularCommon.java b/src/main/java/tech/jhipster/lite/generator/client/angular/common/domain/AngularCommon.java
index 7b17ad5bc72..1463f6b2e4c 100644
--- a/src/main/java/tech/jhipster/lite/generator/client/angular/common/domain/AngularCommon.java
+++ b/src/main/java/tech/jhipster/lite/generator/client/angular/common/domain/AngularCommon.java
@@ -8,7 +8,7 @@ public class AngularCommon {
 
   protected static final List<String> DECORATOR_REGEX_LIST = List.of("(^@[A-Z]{1}[\\w]+\\(\\{)");
 
-  protected static final String DECLARATIONS_REGEX = "^([\\s]+declarations:[\\s]+\\[[^\\]]+\\])";
+  protected static final String DECLARATIONS_REGEX = "^([\\s]+declarations:[\\s]+\\[[^\\]]+\\][\\s,]*)";
 
   protected static final List<String> DECLARATIONS_WITH_ARRAY_VALUES_REGEX_LIST = List.of(
     "^[\\s]+(declarations:[\\s]+\\[[^\\]]+)\\]",
@@ -25,8 +25,8 @@ public class AngularCommon {
   );
 
   protected static final String COMA = ",";
-
-  protected static final String OPENING_BRACKET = "[";
+  protected static final String O_BRACKET = "[";
+  protected static final String C_BRACKET = "]";
 
   private AngularCommon() {
     // Cannot be instantiated
diff --git a/src/main/java/tech/jhipster/lite/generator/client/angular/common/domain/AngularCommonDomainService.java b/src/main/java/tech/jhipster/lite/generator/client/angular/common/domain/AngularCommonDomainService.java
index 481fb155204..70fea8c47d1 100644
--- a/src/main/java/tech/jhipster/lite/generator/client/angular/common/domain/AngularCommonDomainService.java
+++ b/src/main/java/tech/jhipster/lite/generator/client/angular/common/domain/AngularCommonDomainService.java
@@ -2,11 +2,12 @@
 
 import static tech.jhipster.lite.common.domain.WordUtils.indent;
 import static tech.jhipster.lite.generator.client.angular.common.domain.AngularCommon.COMA;
+import static tech.jhipster.lite.generator.client.angular.common.domain.AngularCommon.C_BRACKET;
 import static tech.jhipster.lite.generator.client.angular.common.domain.AngularCommon.DECLARATIONS_REGEX;
 import static tech.jhipster.lite.generator.client.angular.common.domain.AngularCommon.DECLARATIONS_WITH_ARRAY_VALUES_REGEX_LIST;
 import static tech.jhipster.lite.generator.client.angular.common.domain.AngularCommon.DECORATOR_REGEX_LIST;
 import static tech.jhipster.lite.generator.client.angular.common.domain.AngularCommon.ENV_VARIABLES_WITH_VALUES_REGEX_LIST;
-import static tech.jhipster.lite.generator.client.angular.common.domain.AngularCommon.OPENING_BRACKET;
+import static tech.jhipster.lite.generator.client.angular.common.domain.AngularCommon.O_BRACKET;
 import static tech.jhipster.lite.generator.client.angular.common.domain.AngularCommon.PROVIDERS_WITH_ARRAY_VALUES_REGEX_LIST;
 
 import java.io.IOException;
@@ -139,7 +140,7 @@ private Optional<String> getFirstMatchInFile(List<String> regexList, String file
 
   private String appendValuesInArray(String fileContent, String prefixWithArrayValuesStr, String arrayValuesToAdd, String endOfLine) {
     StringBuilder updatedArrayValuesStr = new StringBuilder(prefixWithArrayValuesStr.stripTrailing());
-    if (!prefixWithArrayValuesStr.trim().endsWith(OPENING_BRACKET) && !updatedArrayValuesStr.toString().endsWith(COMA)) {
+    if (!prefixWithArrayValuesStr.trim().endsWith(O_BRACKET) && !updatedArrayValuesStr.toString().endsWith(COMA)) {
       updatedArrayValuesStr.append(COMA);
     }
     updatedArrayValuesStr.append(endOfLine).append(arrayValuesToAdd.stripTrailing()).append(endOfLine).append(indent(1));
@@ -148,9 +149,18 @@ private String appendValuesInArray(String fileContent, String prefixWithArrayVal
 
   private String appendProvidersAfterDeclarations(String fileContent, String fullFilePath, String providers, Project project) {
     String declarationsStr = getFirstMatchInFile(List.of(DECLARATIONS_REGEX), fileContent)
+      .map(String::stripTrailing)
       .orElseThrow(() -> new GeneratorException("Missing declarations in file: " + fullFilePath));
     String newProvidersArrayStr =
-      indent(1) + "providers: [" + project.getEndOfLine() + providers.stripTrailing() + project.getEndOfLine() + indent(1) + "]";
+      indent(1) +
+      "providers: " +
+      O_BRACKET +
+      project.getEndOfLine() +
+      providers.stripTrailing() +
+      project.getEndOfLine() +
+      indent(1) +
+      C_BRACKET +
+      COMA;
     String declarationsAndProvidersStr = declarationsStr.trim().endsWith(COMA) ? declarationsStr : declarationsStr + COMA;
     declarationsAndProvidersStr += project.getEndOfLine() + newProvidersArrayStr;
     return fileContent.replace(declarationsStr, declarationsAndProvidersStr);
diff --git a/src/test/java/tech/jhipster/lite/generator/client/angular/common/domain/AngularCommonDomainServiceTest.java b/src/test/java/tech/jhipster/lite/generator/client/angular/common/domain/AngularCommonDomainServiceTest.java
index 2819d152887..0c65ca662af 100644
--- a/src/test/java/tech/jhipster/lite/generator/client/angular/common/domain/AngularCommonDomainServiceTest.java
+++ b/src/test/java/tech/jhipster/lite/generator/client/angular/common/domain/AngularCommonDomainServiceTest.java
@@ -459,7 +459,7 @@ private static Stream<Arguments> contentFileInputsProvider() {
             declarations: [AppComponent],
             providers: [
               { provide: HTTP_INTERCEPTORS, useClass: HttpAuthInterceptor, multi: true, },
-            ]
+            ],
           })
           """,
           "New providers array after declarations (without comma)"
@@ -532,6 +532,24 @@ void shouldAddProviders(String inputFile, String expectedContentFile, @SuppressW
       }
     }
 
+    @Test
+    void shouldNotAddWhenProvidersAndDeclarationsNotFoundInFile() {
+      // Given
+      Project project = Project.builder().folder("/project/path").build();
+      String filePath = "file/path";
+      String providers = "{ provide: HTTP_INTERCEPTORS, useClass: HttpAuthInterceptor, multi: true, }";
+      try (MockedStatic<FileUtils> fileUtils = mockStatic(FileUtils.class)) {
+        String fullFilePath = "/project/path/file/path";
+        fileUtils.when(() -> FileUtils.getPath("/project/path", filePath)).thenReturn(fullFilePath);
+        fileUtils.when(() -> FileUtils.read(fullFilePath)).thenReturn("");
+
+        // When + Then
+        assertThatThrownBy(() -> angularCommonDomainService.addProviders(project, filePath, providers))
+          .isInstanceOf(GeneratorException.class)
+          .hasMessageContaining(fullFilePath);
+      }
+    }
+
     @Test
     void shouldNotAddWhenFileCannotBeRead() {
       // Given
@@ -573,7 +591,7 @@ void shouldNotAddWhenFileCannotBeWritten() {
         fileUtils.when(() -> FileUtils.write(anyString(), anyString(), anyString())).thenThrow(IOException.class);
 
         // When + Then
-        assertThatThrownBy(() -> angularCommonDomainService.addDeclarations(project, filePath, providers))
+        assertThatThrownBy(() -> angularCommonDomainService.addProviders(project, filePath, providers))
           .isInstanceOf(GeneratorException.class)
           .hasMessageContaining(fullFilePath);
       }