diff --git a/sootup.core/src/main/java/sootup/core/inputlocation/AnalysisInputLocation.java b/sootup.core/src/main/java/sootup/core/inputlocation/AnalysisInputLocation.java
index aecc5648ae..a26868901e 100644
--- a/sootup.core/src/main/java/sootup/core/inputlocation/AnalysisInputLocation.java
+++ b/sootup.core/src/main/java/sootup/core/inputlocation/AnalysisInputLocation.java
@@ -58,7 +58,7 @@ public interface AnalysisInputLocation {
   /**
    * Scan the input location and create ClassSources for every compilation / interpretation unit.
    *
-   * @return The source entries.
+   * @return   an Autocloseable resource that must be closed!
    */
   @Nonnull
   Stream<? extends SootClassSource> getClassSources(@Nonnull View view);
diff --git a/sootup.java.bytecode.frontend/src/main/java/sootup/java/bytecode/frontend/inputlocation/ArchiveBasedAnalysisInputLocation.java b/sootup.java.bytecode.frontend/src/main/java/sootup/java/bytecode/frontend/inputlocation/ArchiveBasedAnalysisInputLocation.java
index b698c5bb7c..01f5978ae8 100644
--- a/sootup.java.bytecode.frontend/src/main/java/sootup/java/bytecode/frontend/inputlocation/ArchiveBasedAnalysisInputLocation.java
+++ b/sootup.java.bytecode.frontend/src/main/java/sootup/java/bytecode/frontend/inputlocation/ArchiveBasedAnalysisInputLocation.java
@@ -108,6 +108,7 @@ public Optional<JavaSootClassSource> getClassSource(@Nonnull ClassType type, @No
     }
   }
 
+  /** returns a Autocloseable resource that must be closed! */
   @Override
   @Nonnull
   public Stream<JavaSootClassSource> getClassSources(@Nonnull View view) {
diff --git a/sootup.java.bytecode.frontend/src/main/java/sootup/java/bytecode/frontend/inputlocation/PathBasedAnalysisInputLocation.java b/sootup.java.bytecode.frontend/src/main/java/sootup/java/bytecode/frontend/inputlocation/PathBasedAnalysisInputLocation.java
index dbd61a9a06..6b26916616 100644
--- a/sootup.java.bytecode.frontend/src/main/java/sootup/java/bytecode/frontend/inputlocation/PathBasedAnalysisInputLocation.java
+++ b/sootup.java.bytecode.frontend/src/main/java/sootup/java/bytecode/frontend/inputlocation/PathBasedAnalysisInputLocation.java
@@ -141,7 +141,7 @@ public static PathBasedAnalysisInputLocation create(
             + "' has to be pointing to the root of a class container, e.g. directory, jar, zip, apk, war etc.");
   }
 
-  /** returns a resource that must be closed! */
+  /** returns a Autocloseable resource that must be closed! */
   @Nonnull
   protected Stream<JavaSootClassSource> walkDirectory(
       @Nonnull Path dirPath,