DOC: code comments

src/main/java/org/caosdb/server/CaosDBServer.java

...n/java/org/caosdb/server/database/BackendTransaction.java

...atabase/backend/transaction/InsertTransactionHistory.java

...aosdb/server/database/backend/transaction/RuleLoader.java

...a/org/caosdb/server/entity/container/DeleteContainer.java

...a/org/caosdb/server/entity/container/InsertContainer.java

...a/org/caosdb/server/entity/container/UpdateContainer.java

...in/java/org/caosdb/server/jobs/core/InsertFilesInDir.java

.../java/org/caosdb/server/resource/EntityOwnerResource.java

...org/caosdb/server/resource/EntityPermissionsResource.java

...osdb/server/resource/transaction/EntityNamesResource.java

...rg/caosdb/server/resource/transaction/EntityResource.java

...b/server/resource/transaction/RetrieveEntityResource.java

.../java/org/caosdb/server/transaction/WriteTransaction.java

.../database/backend/transaction/BackendTransactionTest.java