EventBus integration, no functional change

[jaksonlin]

to support future feature, enhance the codebase layout, change the event handling using EventBus

[github-actions]

Qodana Community for JVM

89 new problems were found

Inspection name	Severity	Problems
Call to 'printStackTrace()'	🔶 Warning	9
Constant values	🔶 Warning	8
Nullability and data flow problems	🔶 Warning	8
Unused import	🔶 Warning	8
Field may be 'final'	🔶 Warning	7
Unnecessary call to 'toString()'	🔶 Warning	7
Unchecked warning	🔶 Warning	6
Field can be local	🔶 Warning	5
Result of method call ignored	🔶 Warning	5
@NotNull/@Nullable problems	🔶 Warning	5
Minimum 'switch' branches	🔶 Warning	3
Incorrect string capitalization	🔶 Warning	2
Redundant type cast	🔶 Warning	2
Redundant 'if' statement	🔶 Warning	2
'InputStream' and 'OutputStream' can be constructed using 'Files' methods	🔶 Warning	1
Mismatched query and update of collection	🔶 Warning	1
Redundant 'Collection' operation	🔶 Warning	1
Stream API call chain can be simplified	🔶 Warning	1
Unnecessary 'return' statement	🔶 Warning	1
Unnecessary semicolon	🔶 Warning	1
Unused assignment	🔶 Warning	1
Write-only object	🔶 Warning	1
Non-constant string concatenation as argument to logging call	◽️ Notice	3
Method can be extracted	◽️ Notice	1

💡 Qodana analysis was run in the pull request mode: only the changed files were checked

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