diff --git a/CityDoctorParent/CityDoctorModel/src/main/java/de/hft/stuttgart/citydoctor2/parser/CityGmlParser.java b/CityDoctorParent/CityDoctorModel/src/main/java/de/hft/stuttgart/citydoctor2/parser/CityGmlParser.java
index 9073e66dbf0f7c5b732e5ce9134e5b6c1df2e1d5..73501dabd5f4b18d51a8bf0a5cfe5724564292d3 100644
--- a/CityDoctorParent/CityDoctorModel/src/main/java/de/hft/stuttgart/citydoctor2/parser/CityGmlParser.java
+++ b/CityDoctorParent/CityDoctorModel/src/main/java/de/hft/stuttgart/citydoctor2/parser/CityGmlParser.java
@@ -39,7 +39,7 @@ import javax.xml.validation.SchemaFactory;
 import javax.xml.validation.Validator;
 
 import de.hft.stuttgart.citydoctor2.zip.CityGmlZipEntry;
-import de.hft.stuttgart.citydoctor2.zip.CityGmlZipInputStream;
+import de.hft.stuttgart.citydoctor2.zip.CityGmlZipEntryFile;
 import org.apache.logging.log4j.Level;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
@@ -199,8 +199,8 @@ public class CityGmlParser {
 		CityGMLContext context = getContext();
 
 		if (config.getValidate()) {
-			try (CityGmlZipInputStream cgis = new CityGmlZipInputStream(entry)){
-				List<String> messages = validateStream(cgis.getInputStream(),context);
+			try (CityGmlZipEntryFile entryFile = new CityGmlZipEntryFile(entry)){
+				List<String> messages = validateStream(entryFile.getInputStream(),context);
 				if (!messages.isEmpty()) {
 					throw new InvalidGmlFileException("Invalid GML File. First error: \n" + messages.get(0));
 				}
@@ -220,8 +220,8 @@ public class CityGmlParser {
 	public static CityDoctorModel decompressAndParseCityGmlEntry(CityGmlZipEntry entry, ParserConfiguration config, ProgressListener l, CityGMLContext context)
 			throws CityGmlParseException {
 
-		try (CityGmlZipInputStream cgis = new CityGmlZipInputStream(entry)){
-			BufferedInputStream bis = new BufferedInputStream(cgis.getInputStream());
+		try (CityGmlZipEntryFile entryFile = new CityGmlZipEntryFile(entry)){
+			BufferedInputStream bis = new BufferedInputStream(entryFile.getInputStream());
 			readEpsgCodeFromInputStream(bis,config);
 			CityGMLInputFactory in = context.createCityGMLInputFactory()
 					.withChunking(ChunkOptions.chunkByProperties(chunkProperties).skipCityModel(false));
@@ -294,8 +294,8 @@ public class CityGmlParser {
 
 	public static void streamCityGml(CityGmlZipEntry entry, ParserConfiguration config, CityGmlConsumer cityObjectConsumer,
 									 String outputFile) throws CityGmlParseException, IOException {
-		try (CityGmlZipInputStream cgis = new CityGmlZipInputStream(entry)) {
-			parseEpsgCodeFromStream(cgis.getInputStream(), config);
+		try (CityGmlZipEntryFile entryFile = new CityGmlZipEntryFile(entry)) {
+			parseEpsgCodeFromStream(entryFile.getInputStream(), config);
 			startReadingCityGmlZipEntry(entry, config, null,cityObjectConsumer, outputFile);
 		} catch (ParserConfigurationException | SAXException | IOException e) {
 			throw new CityGmlParseException("Failed to read CityGML stream", e);
@@ -360,8 +360,8 @@ public class CityGmlParser {
 
 	private static void startReadingCityGmlZipEntry(CityGmlZipEntry entry, ParserConfiguration config, ProgressListener l,
 													CityGmlConsumer cityObjectConsumer, String outputFile) {
-		try (CityGmlZipInputStream cgis = new CityGmlZipInputStream(entry);
-			 ObservedInputStream ois = new ObservedInputStream(cgis.getInputStream(), entry.getFileSize())){
+		try (CityGmlZipEntryFile entryFile = new CityGmlZipEntryFile(entry);
+			 ObservedInputStream ois = new ObservedInputStream(entryFile.getInputStream(), entry.getFileSize())){
 			if (l != null) {
 				ois.addListener(l::updateProgress);
 			}
diff --git a/CityDoctorParent/CityDoctorModel/src/main/java/de/hft/stuttgart/citydoctor2/zip/CityGmlZipEntry.java b/CityDoctorParent/CityDoctorModel/src/main/java/de/hft/stuttgart/citydoctor2/zip/CityGmlZipEntry.java
index 00b1397d4323a7759565f42601c147d85fc91f55..6b1a429b6155b4d35b1f6df8bad92e76d0c5e693 100644
--- a/CityDoctorParent/CityDoctorModel/src/main/java/de/hft/stuttgart/citydoctor2/zip/CityGmlZipEntry.java
+++ b/CityDoctorParent/CityDoctorModel/src/main/java/de/hft/stuttgart/citydoctor2/zip/CityGmlZipEntry.java
@@ -71,8 +71,8 @@ public class CityGmlZipEntry implements Serializable {
         if (fileSize != -1L) {
             return memoryLimit > fileSize;
         }
-        try (CityGmlZipInputStream cgis = new CityGmlZipInputStream(this)){
-            long filesize = cgis.getFileSize();
+        try (CityGmlZipEntryFile entryFile = new CityGmlZipEntryFile(this)){
+            long filesize = entryFile.getFileSize();
             if (filesize != -1){
                 this.fileSize = filesize;
                 return memoryLimit > fileSize;
diff --git a/CityDoctorParent/CityDoctorModel/src/main/java/de/hft/stuttgart/citydoctor2/zip/CityGmlZipInputStream.java b/CityDoctorParent/CityDoctorModel/src/main/java/de/hft/stuttgart/citydoctor2/zip/CityGmlZipEntryFile.java
similarity index 90%
rename from CityDoctorParent/CityDoctorModel/src/main/java/de/hft/stuttgart/citydoctor2/zip/CityGmlZipInputStream.java
rename to CityDoctorParent/CityDoctorModel/src/main/java/de/hft/stuttgart/citydoctor2/zip/CityGmlZipEntryFile.java
index 472bb383e03063ce54d0b8099574659453987b64..967fe29bfd88efc74d53dbe592f037c0e87c4d96 100644
--- a/CityDoctorParent/CityDoctorModel/src/main/java/de/hft/stuttgart/citydoctor2/zip/CityGmlZipInputStream.java
+++ b/CityDoctorParent/CityDoctorModel/src/main/java/de/hft/stuttgart/citydoctor2/zip/CityGmlZipEntryFile.java
@@ -6,14 +6,14 @@ import java.io.InputStream;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipFile;
 
-public class CityGmlZipInputStream implements AutoCloseable {
+public class CityGmlZipEntryFile implements AutoCloseable {
 
     private final ZipFile zip;
     private final ZipEntry zipEntry;
     private boolean closed = false;
     private static final long MB = 1024 * 1024L;
 
-    public CityGmlZipInputStream(CityGmlZipEntry entry) throws IOException {
+    public CityGmlZipEntryFile(CityGmlZipEntry entry) throws IOException {
         CityGmlZipArchive archive = entry.getArchive();
         zip = new ZipFile(archive.getArchivePath().toFile());
         zipEntry = zip.getEntry(entry.getFileName());
diff --git a/CityDoctorParent/CityDoctorValidation/src/main/java/de/hft/stuttgart/citydoctor2/check/Checker.java b/CityDoctorParent/CityDoctorValidation/src/main/java/de/hft/stuttgart/citydoctor2/check/Checker.java
index c096b35832295373baed69866a3fdf41c381cca2..f498e1c6bdd34012e679f0636992ee1be12fc4c0 100644
--- a/CityDoctorParent/CityDoctorValidation/src/main/java/de/hft/stuttgart/citydoctor2/check/Checker.java
+++ b/CityDoctorParent/CityDoctorValidation/src/main/java/de/hft/stuttgart/citydoctor2/check/Checker.java
@@ -49,7 +49,7 @@ import javax.xml.transform.sax.SAXResult;
 import javax.xml.transform.stream.StreamSource;
 
 import de.hft.stuttgart.citydoctor2.zip.CityGmlZipEntry;
-import de.hft.stuttgart.citydoctor2.zip.CityGmlZipInputStream;
+import de.hft.stuttgart.citydoctor2.zip.CityGmlZipEntryFile;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
@@ -754,8 +754,8 @@ public class Checker {
 			PdfStreamReporter pdfReporter = getPdfReporter(config, pdfBos, fileName);
 
 			// execute schematron first
-			try (CityGmlZipInputStream cgis = new CityGmlZipInputStream(entry)) {
-				SvrlContentHandler handler = executeSchematronValidationIfAvailable(config, cgis.getInputStream());
+			try (CityGmlZipEntryFile entryFile = new CityGmlZipEntryFile(entry)) {
+				SvrlContentHandler handler = executeSchematronValidationIfAvailable(config, entryFile.getInputStream());
 
 				CityGmlConsumer con = new StreamCityGmlConsumer(c, xmlReporter, pdfReporter, handler, config, null);
 				// parse and validate