docs(spdx): Distinguish all "The name must not be blank" requirements

Make it easier to understand from reading logs which SPDX class is
affected.

Signed-off-by: Sebastian Schuberth <sebastian@doubleopen.org>

utils/spdx/src/main/kotlin/model/SpdxDocument.kt

@@ -137,7 +137,7 @@ data class SpdxDocument(
 
         require(spdxVersion.isNotBlank()) { "The SPDX version must not be blank." }
 
-        require(name.isNotBlank()) { "The name must not be blank." }
+        require(name.isNotBlank()) { "The document name for SPDX-ID '$spdxId' must not be blank." }
 
         require(dataLicense.isNotBlank()) { "The data license must not be blank." }
 

utils/spdx/src/main/kotlin/model/SpdxFile.kt

@@ -179,7 +179,7 @@ data class SpdxFile(
 
         require(copyrightText.isNotBlank()) { "The copyright text must not be blank." }
 
-        require(filename.isNotBlank()) { "The filename must not be blank." }
+        require(filename.isNotBlank()) { "The filename for SPDX-ID '$spdxId' must not be blank." }
 
         require(licenseConcluded.isSpdxExpressionOrNotPresent()) {
             "The license concluded must be either an SpdxExpression, 'NONE' or 'NOASSERTION', but was " +

utils/spdx/src/main/kotlin/model/SpdxPackage.kt

@@ -201,7 +201,7 @@ data class SpdxPackage(
 
         require(downloadLocation.isNotBlank()) { "The download location must not be blank." }
 
-        require(name.isNotBlank()) { "The name must not be blank." }
+        require(name.isNotBlank()) { "The package name for SPDX-ID '$spdxId' must not be blank." }
 
         val validPrefixes = listOf(SpdxConstants.PERSON, SpdxConstants.ORGANIZATION)
 

utils/spdx/src/main/kotlin/model/SpdxSnippet.kt

@@ -156,7 +156,7 @@ data class SpdxSnippet(
         }
 
         require(name.isNotBlank()) {
-            "The name must not be blank."
+            "The snippet name for SPDX-ID '$spdxId' must not be blank."
         }
 
         require(snippetFromFile.isNotBlank()) {