NPE in ApiObjectDoc for 1.1.4

[MarcMielke]

[INFO] --- jsondoc-maven-plugin:1.1.4:generate (generate.jsondoc) @ erin-server ---
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
[ERROR]
java.lang.NullPointerException
at org.jsondoc.core.pojo.ApiObjectDoc.buildFromAnnotation(ApiObjectDoc.java:57)
at org.jsondoc.core.scanner.AbstractJSONDocScanner.getApiObjectDocs(AbstractJSONDocScanner.java:293)
at org.jsondoc.core.scanner.AbstractJSONDocScanner.getApiObjectsMap(AbstractJSONDocScanner.java:333)
at org.jsondoc.core.scanner.AbstractJSONDocScanner.getJSONDoc(AbstractJSONDocScanner.java:84)
at org.jsondoc.JSONDocMojo.execute(JSONDocMojo.java:87)

from this:

@ApiObject(description = "Source DTO")
public interface Source {
@ApiObjectField
public static final Datasource type = Datasource.Source;
}